Changelog

A day-by-day log of everything we ship

September 21, 2026

Fixed emails sent to everyone getting the premium footer when their archive was paid-only (thanks, Mandy!)

September 19, 2026

Added a source parameter to the imports API, so you can override detection with values such as custom before starting a subscriber import

September 18, 2026

Fixed the embedded paid subscription form charging a reader a second time when they were already subscribed
Made your custom email CSS able to change the text size and spacing of YouTube and Vimeo embeds (thanks, Are.na!)
Powered up the portal links in your emails so they would pre-authenticate
Gave the confirmation email a big ol' button

September 17, 2026

Made big subscriber imports ~70% faster
Sped up the emails API listing, too
Fixed imports reporting more new subscribers than they added when rows had tags or already existed
Compacted the boxed tables throughout the app and narrowed the bulk-action dialogs to fit their content

September 16, 2026

Made your email analytics sort tracked links by clickers, so the most popular links rise to the top (thanks, Kale!)
Fixed block quotes in emails losing their left padding in Apple Mail on iPhone
Made it possible to ban authors while deleting or marking comments as spammy
Made Bluesky profiles and posts you paste into an email render as tidy cards with the author's avatar, instead of a stack of oversized images
Improved the generic (and sometimes just wrong) email we send you when we, uh, fail to send your email
Fixed an edge case where emails with a social media post attached refused to delete
Fixed Instagram links written as www.instagram.com showing a generic favicon instead of the Instagram icon (thanks, Ben!)
Improved how hosting domains worked if you churned (thanks, Brian!)

September 15, 2026

Email analytics

Taught the firewall to block subscription-bombing bursts that plus-tag one real address with random suffixes across many newsletters (thanks, Ben!)
Fixed readers who unsubscribed and were later removed by subscriber cleanup being told to contact you when they tried to resubscribe
Fixed a bug where some Gmail spam complaints relayed by Postmark were being counted as deferrals
Fixed the subscriber page hiding confirmation reminders on newsletters without the paid automations feature, even though the reminders still went out
Added a "show password" button to the sign-up and login forms
Fixed YouTube and Vimeo cards in Classic emails having extra space around the thumbnail and title

September 14, 2026

Made failing RSS-to-email feeds say why they're blocked (SiteGround captcha, Cloudflare, a fussy robots.txt) instead of a generic error, and put that explanation on the external feed API too
Fixed the portal not reflecting a paid subscription pause, change, cancellation or reactivation until a later refresh
Fixed a paused subscription's card naming a renewal date that never comes
Fixed a pile of subscribe form quirks in the Lovelace theme: unstyled fields and checkboxes, a Subscribe button that went blank while submitting, and a confirmation message that showed up twice
Made deleting an email draft less alarming: Buttondown now warns about broken archive links only when the selected emails have actually been published (thanks, Marcin!)
Fixed click tracking breaking links (including buttons) whose URL had a stray space at the start or end (thanks, Ben!)
Fixed emails rendering at desktop width on phones when your custom CSS paired an !important rule with a mobile override (thanks, Kaeti!)
Made the failure rows on your email dashboard list the actual addresses behind them (no more "Nothing here yet") (thanks, David!)
Balanced the latest edition link on the Modern theme's subscribe page H1 (thanks, CSS working group!)
Renamed your default API key from "Untitled key" to "Primary Key"
Fixed bulk unsubscribing addresses sometimes notifying you as if those subscribers had unsubscribed themselves

September 13, 2026

Made the preview on your email and web CSS pages work with drafts too, so you can see how that new header style looks on the issue you're writing before anyone else does
Tightened up some rendering/sanitization issues in comments
Fixed the subscriber portal showing an "Upgrade" button on newsletters that turned off their paid subscriptions
Fixed the related emails at the bottom of an archive page linking to drafts or emails you hid from the web
Fixed English-only labels on comments and the subscribe form in non-English newsletters, Lovelace archive pages losing your search when you paged through, and post dates showing in the wrong format and language

September 12, 2026

Archives now have a Crawling add-on: one toggle each for search engines, AI crawlers, and everything else, replacing the old noindex flags and the blocked user agents list

Retired the separate API changelog on the docs site and moved every one of its entries — all the way back to 2020 — onto this page: API changes now land here alongside everything else, and backwards-incompatible ones get their own post plus a row on Versioning
Fixed pressing ⌘S on an already-saved settings page opening the browser's Save dialog instead of being quietly ignored (thanks, Marcin!)
Fixed bulk actions ignoring your filters when you deselect a row
Fixed filtered bulk actions and the date filter on the comments page
Fixed the live LaTeX and Mermaid examples in the docs showing a render error instead of the rendered output
Gave snippets, web- and email-only blocks, and comments one shared look in the editor, each with a header you can drag to move it and a button to delete it
Made transactional emails inline their CSS to improve rendering in email clients (hi, Gmail)
Fixed Zapier disconnecting your account when it tried to refresh its access token
Fixed tags vanishing from a brand-new form the moment you saved it
Fixed deleting a newsletter erroring out when one of its comments came from a subscriber you had already deleted

September 10, 2026

Raised the cap on how many actions a single automation can have from 25 to 100

September 9, 2026

Made the subscriber page say why an automation was skipped or failed, not just that it was
Fixed a custom subject on an automation notification not saving, and being ignored on send
Fixed an automation notification that isn't the first action sending with the wrong recipient and body
Rebuilt the comments page as a sortable table with a detail view and a menu on each row to mark a comment as active or spammy, or delete it

September 8, 2026

Made switched-off toggles, checkboxes and radio buttons easier to see on low-contrast displays (thanks, Kat!)
Fixed the email preview erroring out — and dark mode and mobile styles going missing — for newsletters whose custom CSS uses @import to load a web font
Fixed Apple Podcasts episode links in emails showing the show's name and artwork where the episode's title and cover should be
Fixed subscriber imports erroring out on CSVs saved with carriage returns, yuck
Fixed creating or updating an email through the API erroring out unhelpfully when the body has a broken template tag

September 7, 2026

You can now export the itemized events behind an email's analytics — every open, click, and delivery with its timestamp — straight from the email's detail pane

Added a portal link to the email we send folks who churn from premium subscriptions (just in case, you know?)
Fixed the paid subscription reactivate flow erroring out after a breaking API change for some older users
Fixed a bug where drafts of emails with "related emails" weren't showing their pals
GET /v1/subscribers/{id_or_email}/automations now returns a read-only error code on each attempt, so the API can tell you why an automation attempt was skipped or failed — it's null when the attempt succeeded or hasn't run yet

September 6, 2026

Fixed a scheduled email whose content could not be rendered (for example, an unresolved template tag pasted into the body) getting stuck and never sending — Buttondown now marks it as errored with the reason so you can fix it and reschedule
Fixed a bug where paid subscribers got stuck unsubscribed when the subscription arrived through a renewal
Fixed some odd edge cases with snippets and filtered blocks in Fancy mode
Improved how various components handled and displayed network errors

September 5, 2026

Fixed the webhook event picker leaving out the subscriber.tags.changed event, so you can now subscribe to it from the dashboard when your newsletter uses tags
Fixed leaving a comment subscribing a brand-new address to a newsletter that has public subscriptions turned off
Fixed the archive showing an issue's newsletter image instead of the photo from the top of the issue when the photo's URL contained an & (thanks, Paul!)
Fixed a link URL with a &# in it (like a page anchor) scrambling any raw HTML later in the same email written in Markdown (thanks, Marcin!)

September 4, 2026

Fixed subscriber referrer URLs showing up percent-encoded
Fixed paging through API list results sometimes repeating or skipping records when many rows shared the same sort value
Fixed the subscriber portal rejecting a save when you only changed your tags or notes, because it treated your existing email as a duplicate (thanks, Edo!)
Improved the accessibility of the form editor (thanks, Robert!)

September 3, 2026

Stopped preflight from calling a link spammy just because the page uses a <meta> refresh
Fixed clicking a footnote in the editor preview opening the Buttondown homepage in a new tab instead of jumping to the footnote
Fixed private mode hiding the bulk "Change visibility" action and the sidebar link to your archives
Made the preflight nagging about missing alt text better by actually showing you the image(s)
Smoothed out a few rough edges in Lovelace
Fixed a bug where some subscriber imports were incorrectly presumed as coming from Pencilbooth

September 2, 2026

Fixed an issue where Mailgun's suppressions were not always propagating (thanks, David!)
Fixed an account staying past due after paying its invoice with a replaced card
Fixed the archive column count accepting negative or absurd values — it's now clamped between 1 and 6
Taught the editor to show rich previews for Spotify podcast links
Fixed survey results not showing the response count next to each answer when filtering
Taught the "Other" import to recognize known export files and hand them to the right importer
Fixed the Zapier integration's "Add Tags" action mixing up tag IDs and names

September 1, 2026

Fixed rejected accounts still seeing an "under review" notice in-app instead of one saying the account wasn't approved
Fixed uploading a PDF through the "Other" import source parking a stuck import that never finished — Buttondown now rejects PDFs up front and points you to upload your email archive instead
Improved the password reset email to look less sus
Made the API requests log record 500s too
Fixed subscriber references on the API requests page never loading when the path used an email instead of an ID
Fixed paid subscribers sometimes missing a subscription date
Fixed bold and linked text in the editor ignoring the color you picked
Capped image resizing in Fancy mode at the email's actual width
Shrank the play button on YouTube thumbnails
Added "Template" and "Theme" as dashboard search terms
Made unknown paths on a hosting domain return a 404 instead of the subscribe form
Fixed the subscriber drilldown for automations that send your latest email showing zeroed-out analytics and hiding the subscribers who got it
Added a one-click CSV download of an email's event log to the analytics panel
Fixed the preflight word and link counts ignoring snippets and your header and footer
Added a preflight warning when a duplicated email's subject still has a (copy) suffix
Fixed a bug where subscriber imports could be mapped to columns that did not exist
Fixed the "Other" import flow treating a bare list of email addresses with an email header line as an archive instead of a subscriber list
Fixed PATCH on a webhook returning a 422 even though the change saved
Improved the date in share images sitting flush against the calendar icon
Fixed team members getting a 404 when opening a draft's web preview, which only worked for the newsletter's owner

August 28, 2026

Fixed a subscriber's automations list showing skipped and failed runs as though they were still scheduled
Fixed automation settings showing unsaved changes after a successful save, and Discard doing nothing
Pinned the subject line and the … menu to the edges of your email list so they stay put when you scroll sideways
Fixed clicking anywhere but the header row when importing subscribers picking the wrong column
Made it possible to leave out columns Buttondown recognized in your file, so you can drop the ones you don't want without remapping the rest
Fixed dividers in the Modern email theme stretching emails past the edge of the screen on narrow phones

August 27, 2026

Fixed italics and bold inside a quote block fading to almost nothing in the Modern email theme when subscribers read in dark mode
Fixed the loading placeholder on list pages leaving a stray scrollbar mid-page
Made passkeys turn up in your browser's autofill, so you can sign in straight from the username field
Fixed the editor showing bolded and linked text in the wrong color (thanks, GhostAgent!)

August 26, 2026

Fixed automation runs triggered by an email showing up as "Deleted subscriber" in the run list — they now show the email's subject, and deleted emails and subscribers each get their own label
Fixed re-adding an unsubscribed subscriber as unactivated (via import or the API) leaving a stale unsubscription date on the record
Fixed email attachments arriving with a mangled attachments_-prefixed filename — they now keep the original file name
Fixed the send-draft endpoint accepting an API key with sending turned off — a key without send permission now gets a 403 instead of a silent success
Evened out the vertical padding in the subscriber-facing sign-in cards

August 25, 2026

Fixed scroll sync in the editor stalling at mermaid diagrams, and made it work both ways in markdown mode
Made embedded subscribe forms and forms always keep the tags they attach — the tags feature turns on when your plan includes it, and the tags stick around either way instead of getting dropped
Fixed paid subscription settings wiping out your unsaved edits whenever Buttondown finished pulling something in from Stripe behind the scenes
Fixed disconnecting Stripe leaving the page looking like it was still connected, so a second attempt reported a failure for something that had already worked

August 24, 2026

Fixed unsubscribing a paid subscriber leaving a second active Stripe subscription still billing — every active subscription on the reader's Stripe customer is now cancelled at period end
Fixed colored text in the Modern email theme turning black the moment you bolded, underlined, or otherwise formatted it (thanks, GhostAgent!)
Fixed reusing a Naked mode email switching to Fancy mode and mangling the underlying HTML — the copy now keeps its original editor mode (thanks, Giuseppe!)

August 21, 2026

Moved the author name into the email design settings, next to your accent color, so your email identity lives in one place
Added the option to mark checkbox fields on your subscribe form as required, so subscribers must tick them before signing up
Fixed one long line in a code block stretching the whole email past the edge of the screen — code now wraps to the width of your email instead
Made skipped todos restorable, so skipping one is no longer permanent

August 20, 2026

Added tag support to forms (thanks, Robert!)
Added better Markdown support to form bodies/successes, too (thanks, Robert again! you rock!)
Tweaked the heading of emails so the canonical URL is linked even if archives are off (thanks, Tao!)
Fixed RSS-to-email posts printing twice when your template renders both the description and content but the feed only publishes one field
Fixed subscriber metadata checkboxes saving a different value depending on where someone subscribed, so filters on those fields missed subscribers
Tidied up the search results page: clicking a result opens it, and account actions no longer appear there
Cleaned API reference copy out of the subscriber and email status tooltips

August 19, 2026

One source of truth for analytics

Documented the events API, so you can pull the same granular email analytics the dashboard shows — deliveries, opens, clicks, and more — over the API
Fixed a very obscure RSS-to-email rollup bug dating back to a 2023 kludge
Removed the footgun of creating identical subscribe form options
Taught the change_email_address automation action to skip cleanly when the target email already belongs to a subscriber
Made the subscribe form theme picker announce the selected theme to screen readers (thanks, Robert!)
Fixed a 500 when confirming a team invitation with blank credentials

August 18, 2026

Fixed a bug where the editor would mistakenly let you remove the slug from sent emails
Added multi-select fields to your subscribe form, so subscribers can pick several answers instead of just one, and made the values editable as pills in subscriber metadata
Improved the standard.site sync mechanism
Fixed a per-email archive visibility toggle so an email set to visible still shows even when the newsletter's archive is disabled
Taught enhanced Bluesky link cards to re-sync themselves when your newsletter's name, description, icon, or theme color changes, instead of waiting for a "Sync now" click

August 17, 2026

Added tag additions and removals to a subscriber's activity feed, complete with a "Tag changes" filter
Fixed automations silently skipping sends of emails whose audience is "nobody" (thanks, Adam!)
Added auto-detection of archive imports that were actually subscriber imports
Fixed an edge case in /v1/subscribers so re-adding an unsubscribed subscriber as unactivated keeps them pending and re-sends confirmation, rather than quietly resubscribing them

August 14, 2026

Breaking

POST /v1/subscribers with X-Buttondown-Collision-Behavior: add now honors type: unactivated on an unsubscribed address, sending a confirmation email instead of resubscribing outright.

Sped up sending drafts from the editor, so they should land in your inbox a lot sooner
Improved the automation analytics dropdowns to show more info
Fixed text pasted from Word locking the editor with "We had some trouble parsing this document" (thanks, Robert!)

August 13, 2026

Added a Backfill archive button to the Bluesky integration, so emails you published before turning on enhanced link cards get them too
Grouped click analytics by domain, so a page linked several ways rolls up under one heading
Moved the web analytics toggle to Settings → Tracking
Fixed standalone images and their captions aligning left in Classic Outlook instead of staying centered (anti-thanks, Outlook!)
Made Buttondown tracking links pasted into the editor unwrap back to their real destination
Fixed being unable to backspace away a blank first line above a table in the editor
Added an external event type (email.send.started) that fires when, well, your email starts sending rather than when it finishes
Fixed the buttons on the subscriber portal rendering at three different widths, with an unreadable Unsubscribe
Fixed the newer/older links at the foot of an archive post always stacking onto two lines, even when both titles fit on one
Fixed images dropped into the Markdown editor going missing unless your cursor was already in the body — and sometimes landing in the subject line instead (thanks, Giuseppe!)
Added a "Delete table" action to the table menu in the editor, so you no longer have to select every cell

August 11, 2026

Rebuilt the archive styling font picker into a searchable specimen panel, so you can see what a typeface looks like before you pick it
Fixed LinkedIn cross-posts getting marked as failed even though they published (thanks, Sean!)

August 8, 2026

We've added segments to the API: saved, reusable audiences you can apply to an email instead of rebuilding the same tag and metadata rules every send.

Fixed non-square newsletter icons still getting stretched in the archive navbar
Tweaked the preflight validator to always show email sizes (thanks, Nancy!)
Added a default email template for all first emails, because most people do not like a blank page
Fixed the comments dialog getting stuck when you already have comments
Repaired historical exports that were causing 422 errors
Hid the full CSS editor links for accounts that can't open them

August 6, 2026

Breaking

X-Buttondown-Collision-Behavior: overwrite no longer returns a 201 while quietly leaving an unsubscribed subscriber untouched — it returns a 400 with subscriber_suppressed.

Introducing forms

Fixed non-square newsletter icons getting stretched on archive pages
Fixed a bug where the portal was returning a 403 for subscribers with many accounts (thanks, Robert!)
Fixed WebP image uploads getting wrongly rejected
Taught the API to return a clear 400 when a resubscribe can't change a subscriber's terminal type, instead of quiet quitting

August 5, 2026

Fixed new subscribers added directly (imports, API, manual adds) not getting a referral code (thanks, Francisco!)
Fixed being unable to put your cursor between two stacked tables in the editor
Changed the labels in Firewall settings — no behavior was modified, but the language is (hopefully) a little less stilted and/or confusing
Redesigned the embedded paid-subscription checkout into a lovely streamlined flow
Added a "Reset to theme defaults" action to your archive styling settings

August 4, 2026

You can now save an audience as a segment — build a set of tag and metadata filters once, name it, and reuse it with a click on every future email

Fixed the "unsaved changes" bar on your sending domain settings covering the add-on it belonged to, instead of sitting at the bottom of the page
Fixed a bug with non-Latin characters failing validation in automations, surveys, and tags

August 3, 2026

Fixed the non-deterministic ordering of the "most popular pages" list in your weekly digest
Fixed cross-posting automations posting the literal word "None" when you hadn't written a post message
Fixed a bug where subscriber imports with malformed dates would get their rows dropped entirely
Taught monthly RSS-to-email to send on any day of the month, not just the first or last day
Improved the plaintext version of the new-subscriber notification email to add tags and metadata (thanks, Robert!)
Gave the bar charts a round of spit and polish
Improved the accessibility (and aesthetic, tbh) of the subscribe form inputs

August 1, 2026

Monthly RSS-to-email sends can now land on any day of the month — pick the 29th, and short months fall back to their last day.

July 31, 2026

You can now make a section of your email visible to just one type of audience with filtered blocks

Made the per-subscriber RSS feed available to all subscribers, not just paid ones
Added a link to your firewall settings in the "attack mode" notification email, so you can jump straight to disabling it or fine-tuning your auditing rules (thanks, Justin!)

July 30, 2026

Added subscriber-level previewing for transactional emails, so you can see how a welcome or reminder renders for a specific subscriber
Added infinite scrolling to list views
Fixed webwalls getting dropped from a draft when you round-tripped from Fancy to Markdown mode
Fixed the scroll arrows on the share image picker not appearing when the preview images finished loading after the page did

July 29, 2026

Taught RSS-to-email to skip enclosures with non-image files
Added scroll arrows and arrow-key controls to the share image picker when publishing an email, so you can reach thumbnails hidden off the right edge without a trackpad (thanks, Mark!)
Fixed the editor not linkifying (definitely a word) sms:, tel:, and template-tag anchor links
Fixed a bug where errors in draft rendering were showing up as [object Object]
Fixed a bug where our embed-code snippets were emitting a plain text input for every metadata field
Fixed importing your data from the "Other" source
Fixed a bug in the resubscribe flow from the archive
Made the archive image-zoom animation respect your "reduce motion" setting
Fixed the embedding iframe preview in your settings rendering under your own subscriber session instead of a fresh one
Added some missing pages to the dashboard search

July 28, 2026

Buttondown archive links posted to Bluesky can now render as enhanced link cards — with your publication's name, avatar, and a themed cover — powered by standard.site.

Gave archive search its own empty state when a search returns nothing, instead of the generic "no emails yet" message
Fixed fonts flickering when morphing between archive previews
Improved the deletion flow for legacy API keys

July 27, 2026

Fixed the links in your settings all announcing as "Manage" or "Configure" to screen readers, each one now names what it manages (thanks, Robert!)
Fixed the "last used" date on your API keys not updating, so it now reflects real usage
Made the "share this email" buttons on your archive pages off by default for new users

July 25, 2026

Buttondown now renders Mermaid diagrams — write a flowchart in Markdown-shaped syntax and it shows up in your archives and emails

Made the "Log in" link on your archive pages open in a modal instead of bouncing you over to the Portal
Centered the premium footer in the Modern email theme

July 24, 2026

Breaking

Creating tags implicitly through the subscriber endpoints now requires a plan that includes tags, and a newsletter's sending and hosting domain verification is readable over the API.

Fixed the API incorrectly allowing free users to create tags via /v1/subscribers
Fixed the "you usually send emails around…" scheduling suggestion showing a stale day and time — it now follows your recent sending cadence instead of being outweighed by a year of older sends (thanks, Alec!)
Added additional font options to the web archives
Fixed a bug where comments from blocked subscribers were getting stuck as "pending"
Fixed the paperclip icon next to attachments on your archive pages rendering way too large
Added Italian translations to our subscriber-facing app (thanks, Riccardo!)

July 23, 2026

Fixed the resubscribe button on your subscribe page throwing an error instead of resubscribing subscribers who'd previously unsubscribed
Added Bandcamp, itch.io, Medium, Etsy, Gumroad, Are.na, Steam, Vimeo, Behance, and AO3 as recognized social links in the footer
Fixed the per-link breakdown in your email analytics counting raw clicks, so each link now counts distinct subscribers and can't out-count your total clicks
Fixed some FOUC in the subscriber Portal
Fixed washed-out dark mode on transactional emails like confirmations and receipts, so Apple Mail stops applying its own muddy auto-inversion
Tweaked comments so that they show up in situ for its author until they confirm their subscription

July 22, 2026

Taught RSS-to-email to pull in featured images that feeds expose via Media RSS (media:content/media:thumbnail) instead of an enclosure
Fixed importing from Mailchimp timing out on newsletters with large audiences
Fixed a bug where sending to the Magic Email wouldn't validate that your attachments are ginormous

July 21, 2026

Added a remove_metadata automation action that clears out a subscriber's metadata fields as part of an automation
Added more transactional emails or when subscribers become undeliverable
Fixed archive pages ignoring images you'd manually resized in your email (thanks, Mark!)
Fixed a confusing error messages when a file upload didn't pass validation

July 20, 2026

Fixed an edge case with reactivating cancelled paid subscription
Fixed a bad cache layer which caused our RSS feeds to occasionally serve links-only feeds (thanks, Cassidy!)
Stopped counting subscribers on snoozed newsletters toward your billable subscriber count, so pausing a newsletter no longer inflates your bill
Fixed importing from a Kit URL bringing in zero posts

July 19, 2026

Added a notification for when a RSS-to-email item is skipped for being too old, so a stale feed item silently vanishing isn't a mystery (thanks, Ethan!)

July 18, 2026

Fixed importing from Ghost dropping the images inside your posts (thanks, Bryn!)
Fixed the subscriber filter hiding paid-subscription statuses whilst your newsletter is paused
Adds a helpful (we hope) suggestion to add an IP address to your API integration so the Firewall can better-classify subscribers (thanks, Matt!)
Fixed bounced confirmation emails showing up as "unknown" in a subscriber's activity feed

July 17, 2026

Added a "Subscribers only" option to the automation action that changes a sent email's archive visibility
Made archive search noticeably faster

July 14, 2026

Fixed the social share preview for archive links sometimes showing an image you'd already swapped out or deleted from your post (thanks, Marco!)
Fixed fancy-mode snippets so buttons and embeds inside them render properly in your emails instead of shipping as raw tags
Fixed an issue with automations with custom delays not saving for new users
Fixed subscribers seeing a generic error instead of a clear message when their card was declined while updating their payment method

July 13, 2026

Fixed reply notifications quoting a subscriber's response as raw HTML, which let the original email's styling bleed into the whole thread — turning it dark and illegible when you replied or forwarded in Outlook (thanks, Paul!)
Fixed stray HTML comments leaking into the auto-generated description and preview text of your emails (thanks, Veronica!)
Fixed web fonts failing to load on your archive and subscribe pages (thanks, Becki!)

July 10, 2026

Fixed passkey sign-in failures returning a 500

July 9, 2026

Redesigned the subscriber portal with native subscription management, so subscribers can manage their own paid subscription
Fixed a 500 at checkout when a promo code was applied to a pay-what-you-want price
Fixed quotes in email subjects breaking the social share and meta tags for your archive
Made the wording for pausing a newsletter consistent — it now says "snooze" and "unsnooze" everywhere, instead of mixing "dormant" and "snooze"

July 8, 2026

Fixed the Custom CSS editor under email and web design settings sitting shorter than its container, which left an empty gap and a doubled border
Fixed the subject field in the HTML ("naked") email editor being indented away from the full-width code editor beneath it

July 7, 2026

Drilling into an email's opens and clicks now happens right in the page — the slow modals are gone

Fixed a bug where Markdown-mode snippets were not rendering correctly
Added a header to the "Edit metadata" dialog showing which subscriber or email you're editing

July 6, 2026

You can now reply to comments via email — answer a comment notification from your inbox and it threads right back into the discussion

Fixed the embedded upgrade form for pay-what-you-want subscriptions showing a one-time charge instead of the correct monthly (or yearly) cadence (thanks, Matt!)
Fixed ungifting a gift subscriber silently doing nothing when they already had a Stripe customer on file
Fixed a bug with the automation editor dropping your cursor after every keystroke
Fixed the embed-code snippets under Settings → Embedding showing barely visible text in light mode

July 5, 2026

Fixed Bookshop and other media link cards in the web archive showing a bogus play button and unreadable colors in dark mode
Fixed emails getting stuck sending when an attachment couldn't be read from storage
Fixed the sign-in ("magic link") email leaking raw HTML into its plain-text version, so it now reads cleanly in clients that show the plain-text part (thanks, Liam!)

July 4, 2026

Fixed survey results with exactly two responses rendering awkwardly (thanks, Amanda!)

July 3, 2026

Paused autosave when a draft was edited elsewhere, so your stale tab can't silently clobber a co-author's changes — you get explicit Reload and Keep my version options
Added a toggle to hide the paid-subscription upsell text in your emails
Changed landing on / sending you straight to your email list — you'll now hit the home page instead
Fixed the survey-response and unsubscribe confirmation pages so their content sits in a centered, readable column instead of stretching amateurishly across the full width of the screen
Fixed the mobile editor toolbar, pop-up menus, and toasts on iPhones so their bottom controls no longer tuck (also amateurishly) under the home indicator
Fixed web fonts not reloading in the preview of the web design settings page

July 2, 2026

Redesigned archive visibility settings with a clearer hierarchy — defaults, per-email overrides, and content-level walls

Improved the subscribe page for people who are already subscribed to remove a dead end
Fixed a bug with Naked mode when using a custom email template
Added the ability to archive prices you no longer offer for paid subscriptions
Added a mobile drawer to exit the email preview, so you're no longer stuck in it on your phone
Fixed a pay-what-you-want price showing the wrong billing cadence (monthly vs. one-time) after it had been renamed in the Stripe dashboard
Fixed custom domain DNS instructions for .org.uk and other multi-part .uk domains

July 1, 2026

Fixed the email design settings page so switching from a custom template back to Modern or Classic actually takes effect, instead of snapping you back to your custom template
Fixed the paywall showing a stale price instead of your current default

June 30, 2026

Added previous/next post navigation to your web archive, so readers can move between issues (with a per-theme switch to turn it off)
Added language support for Japanese (thanks, Takanori!) and Finnish (thanks, Mikko!)
Added a publish endpoint to the API: POST /v1/emails/{id}/publish sends an email right away, or schedules it if you pass a publish_date, instead of making you patch the email yourself

June 29, 2026

Fixed a bug where attempting to gift a subscriber twice would ungift them
Fixed issues with attribution of Windows/Linux desktop visits
Fixed renaming your newsletter to a username someone else already has — you now get a clear error instead of a 500
Fixed some misleading copy on the cancellation page for newsletters under the free limit

June 28, 2026

Fixed a 500 when registration hit a validation error, so signups now surface the actual problem
Squashed two 422s in the app — viewing an email's edit history and autosaving an email's secondary ID

June 27, 2026

Improved the accessibility of outgoing emails, adding lang/dir, <title>, and presentational table roles) , thanks to the 2026 Email Accessibility Report
Expanded the send_post_request Automation to fire on email, Stripe, Shopify, Patreon, and date triggers (aka, basically everything)
Added a lifecycle email nudging you to finish a subscriber import you started but never kicked off
Fixed a bug where PATCHing a gifted subscriber with type: "gifted" would silently strip their gift access
Fixed stale DNS setup reminders firing after your sending domain had already verified

June 26, 2026

Fixed embedded checkout gifts charging the purchaser on a renewing subscription instead of creating the giftee as a one-time gift (thanks, Tamara!)
Fixed RSS-to-email digests getting permanently stuck when feed items contained ${{ ... }} template syntax
Stopped unsupported image formats (HEIC, AVIF, and friends) from reaching the API when you drag, paste, or pick them in the editor
Pointed the create-subscriber dialog at imports instead of the generic subscribers page

June 25, 2026

You can now attach files to the replies you send subscribers from your Inbox — PDFs, images, whatever the conversation calls for

Fixed a bug where the meta description of premium emails was being rendered as HTML (thanks, various Bluesky folks!)
Added support for non-US Bookshop links (thanks, Osbert!)
Added the ability to reference subscriber.source in emails
Fixed a bug where we were letting you use images that emails wouldn't render properly
Tightened up the Subscriber schema
Fixed a bug where we briefly showed the empty state for related emails for a sent email (thanks, Mark!)

June 24, 2026

Formalized three sending-domain paths with consistent reply behavior

Fixed the Header, Footer, and Custom CSS toggles on the email design settings page dropping below their labels when the preview pane is open
Added support for Apple Pay et al in embedded Stripe checkout
Improved the DNS setup email instructions

June 23, 2026

Breaking

The events API now reads from the same event store that powers webhooks: IDs change prefix, the event_type filter narrows, and metadata is normalized.

Fixed a bug where we would show pinned emails as "the latest" (thanks, Mark!)
Fixed a bug with publish_date validation in /v1/emails

June 22, 2026

Fixed a bug where we wouldn't re-send an email to a subscriber who had already clicked it on the web (thanks, Ben!)
Fixed an obscure bug where we sent 422 rather than 400 for certain /v1/subscribers failures
Fixed a bug where pasting content with Jekyll-style {% include %} tags into an email could cause a rendering error
Added backend support for attaching files to in-app replies
Fixed some gross editor conversion bugs
Fixed some responsiveness issues with the settings pages

June 21, 2026

Fixed a bug where double opt-in wasn't firing when subscribing on mobile from the archive page (thanks, Love!)
Added the ability to re-date emails that were imported (thanks, Mark!)
Sped up DNS verification on the backend
Added stricter schema validation for imports and external feeds

June 19, 2026

Added Discord, Reddit, SoundCloud, Spotify, Substack, Telegram, and Tumblr as recognized social links in the footer
Taught CSV imports to auto-select columns whose headers exactly match a field you've used before — email, tags, notes, and your subscriber metadata fields — so re-importing the same spreadsheet needs far less manual remapping
Redesigned the integrations page paywall — the upgrade prompt is now front and center instead of hidden behind a blurred, hover-only grid
Tidied up the search filter — when there's only one thing to filter by, the options now show the moment you open it instead of behind an extra click.

June 18, 2026

The Modern theme's subscribe page now links straight to your latest issue, so visitors can preview what they're signing up for in one click

Fixed a bug where clearing an email's issue number would fail to save
Clamped oversized images in Substack-imported archive posts so they stop spilling past the margin (thanks, SFJ!)
Made it more obvious that you can't use SVGs in the editor

June 17, 2026

Added Apple Pay and Google Pay to embedded checkout for paid subscriptions
Taught the Mailchimp import to accept audience exports, not just full archives
Fixed the subscriber tag picker dropping tags beyond the first page
Fixed a 422 error when saving an email from its analytics drawer
Fixed bulk "Add Note" staying disabled after "select all"
Fixed a bug where churning subscribers saw two "View archives" buttons on the subscribe page

June 16, 2026

The Modern theme can now lay its archive index out as a two-column grid on wide screens, instead of one tall single column

Added promo codes and a currency selector to embedded checkout for paid subscriptions
Fixed a bug where we grabbed fallback images from your linked content
Tweaked RSS-to-email retries to be more gracious with transient failures
Sped up Markdown rendering (and the /render endpoint) so previews feel snappier
Restored the no-JavaScript fallback for the Subscribe button on your web archive
Cleaned up the email scheduling drawer — the "you usually send around…" is a little more compact
Fixed Cmd-clicking a link in the editor so it opens natively on macOS (thanks, SFJ!)

June 15, 2026

Fixed a bug where reordering your tags wouldn't stick after a reload
Fixed a bug where manually creating a subscriber could fail with a 422 error (incident report to come!)
Added pre-flight checking for meta-refresh redirects, which Gmail can treat as a cloaking signal that quietly hurts your deliverability
Improved the email analytics failure breakdown for some non-idiomatic Gmail classifications
Fixed the tag picker dropdown getting cut off and becoming unscrollable when it opened upward

June 14, 2026

Added 3D Secure (sometimes known, perhaps, as SCA) tax support to embedded checkout
Added a paid subscriptions setting to hide the upsell text shown to free subscribers in your emails, for when you'd rather not nudge them to upgrade in every send

June 13, 2026

Added a newsletter ID to webhook payloads for accounts with more than one newsletter, so multi-tenant integrations can route each event to the right newsletter
Added support to RSS-to-email for handling guids as a source of identity
Wrote step-by-step DNS setup guides for Cloudflare and Namecheap, and Buttondown now points you at the right one when it recognizes your provider while you're connecting a domain
Tightened the emails and Subscriber API schemas

June 12, 2026

Fixed a bug where email analytics could count one recipient as both delivered and failed
Fixed the subscribe form's "log in" so existing subscribers get a proper magic-link sign-in instead of a half-broken page that reset itself
Fixed a bug where creating a second newsletter could fail with a 422 error

June 11, 2026

Added the ability to Cmd (or Ctrl)-click a link in the editor to open it
Fixed a responsiveness bug in the Portal
Fix a bug with replies when several newsletters share a custom domain
(Hopefully! Let me know if not!) fixed a bug where we would sometimes send you two copies of your weekly/monthly report
Added a Published date editor to the email Details panel, so you can backdate a sent post to sit where you want it in your archive without resending it
Tweaked the logic for DNS setup so that we stopped showing an MX record when your custom domain already has one
Fixed the behavior of signing out in the subscriber portal for logged-in authors
Added multi-language code snippets to the generic API docs pages
Tightened the exports, newsletters, and external feed API schemas

June 10, 2026

Improved (maybe?) the editor's detection of simultaneous writers
Tweaked surveys IDs to return a more ergonomic error code
Documented webhook multi-tenant routing and tidied up the HMAC signing examples
Tightened the imports OpenAPI schema

June 9, 2026

Improved the design of thumbnails when autoposting to Bluesky
Removed the ability to manually add subscribers who are suppressed by our ESPs

June 8, 2026

Fixed a bizarre issue dropping hyperlinks when Google Docs exported junk ../ segments ahead of the real URL
Tightened up the Snippets OpenAPI schema
Introduced logic to reject subscribers from permanently disabled newsletters who were disabled specifically to protect them from spam-bombing
Fixed a bug where the webhooks API was throwing a 500 on very long webhook URLs
Fixed a bug where you could change the billing of a premium email after it was sent (which would do nothing but was odd and confusing)

June 7, 2026

Documented rate limits, list pagination, email field formats, and outbound webhook payloads in the generated API spec
Improved the OpenAPI schema for images and list filters, with clearer validation errors when a filter field is wrong
Tightened some firewall heuristics, including more freemail domains for historically Gmail-only checks

June 6, 2026

Added a Transactional emails panel to survey analytics for newsletters who add surveys to their welcome emails
Gussied up the responses for failed API requests

June 5, 2026

Breaking

Many 4xx responses now name the remedy and link to the docs, write validation is stricter on automations, survey responses and notes, and a 401 distinguishes missing from invalid credentials.

Added a Web audience column to the emails list, showing who can read each post in your archive
Stopped the email link-checker from flagging valid links that differ only by a #fragment
Fixed the analytics and events APIs returning a 422 error on some valid requests
Added a Public archive shortcut to the sidebar and command palette, opening your reader-facing archive in a new tab
Added a goal-setting step during signup for creators and businesses — pick what you're building toward and optionally set a subscriber or revenue target
Fixed the webhooks API returning a 422 when you listed completed delivery attempts
Renamed the tag toggle to Subscribers can edit on the portal tag form (previously "Subscriber editable")

June 4, 2026

Surveys now render and record responses in transactional emails, like your welcome email

Fixed unsubscribe links that had stopped working for some subscribers
Counted automation sends toward a subscriber's delivered count, so their stats reflect every email they actually received
Returned a clear error instead of a 500 when an API request asked for page 0 or a negative page
Improved how Buttondown detects which app or integration created a subscriber, so more signups get an accurate source

June 3, 2026

You can now leave private notes on your team members — what they handle, why you brought them on, anything worth remembering

Added the ability to leave private notes on your team members
Fixed a bug where subscriber-only emails could be read without logging in on public newsletters
Stopped archive links from being rewritten as tracking links when click tracking is turned off
Fixed a bug where saving an automation could fail because the form sent along extra fields
Fixed a bug where the reminder to confirm a subscription wasn't being sent on newsletters without the automations feature

June 2, 2026

Fixed a bug where saving paid subscriptions settings could fail with an error instead of a clear message when a Stripe price didn't match the product
Improved the OpenAPI schema for automations

June 1, 2026

Fixed a bug where the mobile editor toolbar floated mid-screen on short emails instead of staying pinned above the keyboard
Fixed a bug where a bulk action deleting subscribers or emails with an empty ids list would wipe the entire newsletter — empty or missing ids are now rejected with a clear 400
Fixed a bug where checkout for paid subscriptions could fail when a price was missing a tax behavior
Fixed a bug where sponsorship pages returned errors on a custom domain
Sped up rendering image-heavy emails by indexing hosted images and dropping an unneeded sort

May 31, 2026

Documented every bulk action API type — including subscriber metadata actions — and tightened validation so bad payloads now return a clear 400

May 30, 2026

Fixed a couple of survey bugs — filtering responses by their value and updating freeform answers now behave correctly

May 29, 2026

Added the Polish złoty as a supported currency for paid subscriptions
Moved team invites from a modal into a drawer
Added a nudge toward the social sign-in button for people who only have an SSO login but try to sign in with a password
Stopped the email typo-checker in the subscriber drawer from flagging valid domains like hey.com
Fixed a bug with the firewall incorrectly handling spammy IPs
Fixed the portal sign-in link on the page shown when a custom domain is disabled

May 28, 2026

The subscriber portal now shows gifted subscribers their gift end date, who gifted them, and the gift message

Fixed a bug where logging in on archive pages could fail
Fixed a couple of narrow-width layout bugs on archive pages — pagination no longer gets clipped and a sliver of horizontal scroll is gone
Stopped showing the "premium" label on the Lovelace and Modern archive themes unless paid subscriptions are turned on
Dropped the "browse the full archives" link on the not-found page when the archive is disabled
Fixed a bug where small uploaded images were scaled up in the editor instead of rendering at their natural size
Made the per-email visibility labels match the wording used at the newsletter level
Fixed a bug where some author-facing notifications weren't being sent
Fixed a bug where the new 1MB attachment size limit was rejecting older attachments that were already larger than that
Documented how to import from a generic archive and sped up serializing those imported emails

May 27, 2026

Added a way to reach the portal from archive pages — signed-in subscribers see "Account", and everyone else sees "Log in"
Fixed a bug where logging out of the portal could leave you signed in on archive pages
Fixed layout issues on the subscriber portal where the manage-subscription column and inputs overflowed on mobile
Improved the OpenAPI schema for attachments

May 26, 2026

Fixed a bug where gifted subscribers were being cleared when paid subscriptions were turned off
Restored the "Re-evaluate filters" toggle on the automation settings page
Fixed a bug where survey answers containing / were being rejected
Fixed a bug where some timezones were showing publish dates that were off-by-one
Tightened validation on survey response schemas
Added some helpful links to marketing/docs packages

May 25, 2026

Added a portal link to the archive nav so subscribers can reach their account from any page

Added support for resolving vt.tiktok.com short share links in embeds
Improved how full-width images looked in the editor
Fixed a bug with subject line rendering variables on archive pages
Sped up subscriber-facing archive pages by trimming unused query projections
Tightened API input schemas so that bad payloads now return 422 instead of 500

May 24, 2026

Fixed a bug where cached page view counts could drop unexpectedly
Improved the OpenAPI schema for surveys

May 22, 2026

Improved the OpenAPI schema for Notes
Fixed a bug with validating sending domains
Fixed a bug where some archive pages weren't poking to the right RSS feed
Added pinch-to-zoom support for archive pages
Fixed an issue where pasting from Google Docs would sometimes result in black-on-black text (thanks, SFJ!)
Fixed a bug with subscription reminders not sending out in some cases
Hid the "Paid subscribers only" option for newsletters without paid subscriptions
Fixed a bug with Source Serif 4 not working correctly

May 21, 2026

Sped up the audience size calculation for a given email
Added a warning for when you delete a load-bearing product in Stripe
Added a dedicated /portal URL for subscribers signing in
Improved TikTok embedding support
Made the author-facing dropdown menus more accessible

May 20, 2026

Added a callout for when it's the first send from a new domain
Made the automation trigger picker searchable and accessible
Added a sign-in fallback for no-JS visitors hitting the archive paywall

May 19, 2026

Improved the editor in dark mode

May 18, 2026

Fixed a race condition with Stripe and author registration
Sped up (and cleaned up) the markdown rendering engine
Consolidated some of the docs on paid subscriptions
Fixed a bug where hard bounces on confirmation emails were being referred to as "unknown"
Fixed a bug where comment failures were not being reported
Improved scroll sync between the editor and the preview
Fixed a bug with audience counts not updating after changing the audience (thanks, Glenn!)
Fixed a bug with archival email types not being honored

May 17, 2026

Tweaked subscriber imports to reject any subscribers whose date is in the future
Cleaned up some outdated docs
Sped up the outgoing email validator by 50%
Updated the docs for preflight validators
Started exposing the country associated with a subscriber's IP address via API and the subscriber drawer

May 15, 2026

Fixed a bug with overriding the default icon for social URLs
Restored the YouTube play button in embeds
Fixed a broken callout in the survey drawer
Added the ability to customize where the H1 heading is rendered in the Lovelace theme

May 14, 2026

Improved the mobile styling for the Arbus theme
Fixed a bug where some non-actionable firewall reasons were showing up in the subscriber drawer
Expanded the OpenAPI spec to include new errors

May 13, 2026

Bolstered the filtering of bots from pageview tracking
Tweaked the behavior of resubscribing undeliverable subscribers

May 12, 2026

Started deduping incoming images and attachments by hash
Fixed a bug in the firewall in which we were poorly scoring subscription requests on embedded forms that could be associated with authors
Fixed a bug with the automations timing input
Fixed a bug where we weren't re-driving last_open_date for very new subscribers
Fixed a bug with the idempotency of the Stripe account sync
Tweaked the CSS of the modern email theme to remove some !important
Fixed a bug with apostrophes in Fancy Mode
Improved dark mode styling for inline code and footnotes
Improved the sign-in form styling on the public archive page

May 11, 2026

Fixed a bug where we let authors attempt to bulk-change Stripe subscriptions to a one-time fee
Started enforcing a maximum size of 1MB for all incoming attachments
Fixed a bug with changing your primary Stripe product in paid subscriptions (thanks, Mandy!)
Added validation to reject usernames with @
Fixed a bug where our post-send email pointed to the wrong link to disable said email (thanks, Nic!)
Tweaked the Cloudflare Turnstile to have it show in response to all firewall failures, not just IP-related ones

May 10, 2026

Refactored how imports work to help pave the way towards unified imports across subscriber + archives

May 9, 2026

Fixed a benign bug where very large tag IDs would throw a 500
Fixed a bug where you could accidentally set conflicting hosting + sending domains
Modified the duplicate-email detection for scheduled emails to move potential duplicates back to drafts instead of errored
Added a preflight check to flag if your canonical_url returns a 404
Added a check to reject incoming signups from a domain without an MX record
Fixed a bug where embedded Stripe checkout would not work in iFrames

May 8, 2026

Filter subscribers and automations by source

Fixed a bug with default behavior for premium audiences (thanks, David!)
Fixed the TikTok docs (thanks, Sacha!)
Improved in-app setup for apex domains
Fixed a bug where some settings pages had two kebab menus
Fixed a bug where paywalled archive pages were getting rendered funkily (thanks, Wendy!)
Implemented the /invoke endpoint to manually trigger automations
Started using Google DNS for our DNS lookups
Fixed a bug where very long email addresses were causing the button in the subscribe form to look weird
Added a warning for when you're editing an email draft that's out of date
Added a checkbox to automatically select all rows in a table

May 7, 2026

Automations, rebuilt

Sped up the performance of emails with attachments
Added support for European Portuguese (thanks, Daniel!)
Added more actions for subscriber.paid automation triggers
Added the ability to filter on subscriber.source in automations and sending
Fixed a bug where we were overriding the content type of SVGs
Fixed a huge number of automations papercuts (thanks, Erik!)

May 6, 2026

Added the ability to see existing metadata keys when importing subscribers
Improved the performance of subscriber creation
Tweaked re-confirmation through embedded forms to honor custom confirmation URLs
Added logic to unwrap youtu.be URLs to youtube.com since some clients consider youtu.be URLs to be invalid/spammy (thanks, Rumicat!)
Added logic to fall back to shared click/open domain if a custom tracking domain is not yet fully configured

May 5, 2026

Fixed a benign RSS parsing bug
Added the ability to filter events by those with webhook failures
Tweaked the embedded form flow to append tags rather than replace them for existing subscribers
Added the ability to delete all attachments from the Files page
Added autofocus to the create subscriber modal
Added support for Norwegian (thanks, Øystein!)

May 4, 2026

Breaking

The filters on GET /v1/survey_responses are now symmetric: all three accept multiple IDs, and survey is renamed to survey_id.

Bolstered the docs for webwalls
Fixed a bug where you could create automations with invalid tag filters
Fixed some of Justin's bad design choices

May 3, 2026

Fixed a bug where you could save unrenderable subjects for custom transactional emails
Fixed a bug with Mailchimp imports
Fixed a bug with invalid /v1/notes payloads returning 500

April 29, 2026

Added an automation trigger for subscriber.delivered
Added some missing localization strings in the SubscribeForm
Exposed gift_subscription_end_date in the API (thanks, Glenn!)

April 28, 2026

Added bounce date and bounce reason filters and columns to the subscribers page

Fixed a bug with tag sorting
Added the ability to delete all images
Tightened up the OpenAPI schema
Added the ability to provide alt text for your uploaded newsletter icon

April 27, 2026

Fixed (we hope) how support messages appear in the inbox
Fixed a bug with incorrect export idempotency (thanks, Henrik!)
Fixed a bug with archive imports failing when they shared subjects with existing emails
Added an archive importer for Pencilbooth
Fixed a bug with validation for folks who are given naked_mode gratis (thanks, James!)

April 26, 2026

Fixed a bug with very very old Stripe charges not getting processed

April 25, 2026

Sped up the firewall by adding an index
Updated the /security page by linking to subprocessors
Fixed an issue with importing archives with duplicate titles (thanks, Merel!)

April 24, 2026

Fixed a bug with pageview tracking for individual comment detail pages
Tweaked archive visibility granularity

April 23, 2026

Localized the subjects of transactional emails
Added Turnstile support to custom domains
Fixed a bug with some custom fonts not loading
Moved the "accent color" setting from general to email, since it only impacts emails
Fixed some broken links on this very page
Stopped storing response data for API requests

April 22, 2026

Breaking

API request records now retain response_data only for requests that sent an X-Idempotency-Key; without one, the field is null.

Added backwards-compatible permalinks for Curated imports
Added replies as a top-level analytics metric
Added a pre-flight warning for URL shorteners
Fixed a bug with automation drafts (thanks, Eric!)

April 21, 2026

Fixed a missing space in the footer of the marketing site (thanks, Matt!)
Added a middleware for annoying vulnerability scanners
Fixed a z-index issue with pinned emails
Added a slew of field descriptions to the OpenAPI spec
Tweaked the percentage formatter to show <1% instead of 0% for very low numbers (thanks, Michael!)
Fixed a bug where we were still surfacing a newsletter's email address in transactional emails
Fixed a bug where connection issues would cause the subscribe form to be sad
Added stronger validation to the RSS-to-email endpoints
Added opt-in CSS variable inlining for outbound emails
Fixed a cosmetic bug in Fancy Mode with captionless images

April 20, 2026

Three features are moving behind the paywall

Renamed and cleaned up /settings/files (nee /settings/data)
Added Cloudflare's new email service to the ESP comparison guide
Tweaked the firewall which was penalizing long-but-valid email addresses
Sped up sending domain registration

April 19, 2026

Firewall changes and improvements

Introduced more aggressive blocking of comically large (10MB+) emails
Fixed a bug where we were sending multiple emails for temporary pauses
Cleaned up the email footer copy for premium emails

April 18, 2026

Added the ability to see the audience of emails after they've been sent
Added a chart of accepted vs. blocked subscribers when the firewall is enabled
Tweaked the send_reminders bulk action to send the actual first opt-in email if the subscriber never received it

April 17, 2026

Fixed a bug where errors in alt text / description generation would show up in the text input rather than as toasts
Fixed a bug with redirect-based payment methods in embedded checkout
Improved performance for aggregating failures within an email
Tweaked the Firewall to no longer factor in an author's IP address when changing an email address in the dashboard
Improved performance on Subscriber queries
Fixed some issues with dark mode styling in Fancy Mode

April 16, 2026

Added searching and filtering to this very changelog
Added support for customizing upsell text in paid subscriptions
Fixed a bug where editor mode was showing up in the email's description
Fixed a broken iFrame in the docs
Improved the consistency of the two design settings pages
Added a louder warning for newsletters with incomplete DNS setup
Added some new docs for various automations patterns

April 15, 2026

Started gating metadata and transactional email customization behind paid plans
Added support for blocking certain user agents for custom hosting domains (thanks, Alice!)
Fixed a bug where we allowed transitioning an undeliverable subscriber to regular even if they had an ESP suppression
Added error fixtures to the OpenAPI spec

April 14, 2026

Augmented the double opt-in docs
Fixed some issues with gated archives

April 13, 2026

Improved support for Beehiiv imports
Fleshed out the Shopify integration docs
Added stateful links to the OpenAPI schema
Added a recommendation to /home to turn on automations

April 12, 2026

Wrote a dedicated doc on double opt-in
Rebuilt the embeddings page
Fixed a bug where links in blockquotes would sometimes have an inaccessible color

April 11, 2026

Fixed a bug where the CTA to subscribe would still show even after subscription
Added click/open rate to the subscriber profile drawer (thanks, Reilly!)

April 10, 2026

Fixed a bug where old tags from subscription attempts that failed the firewall would linger (thanks, Michael!)
Improved the archive import drawer state when not started
Improved some selects around creating new automations
Tweaked the custom DNS onboarding to only request an MX record when one doesn't already exist on the domain
Added a public API endpoint for imports
Added some documentation around NS records
Added an archive importer for Curated
Improved the UX when someone attempts to upload a video as an attachment
Added top-level summaries to all list endpoint docs

April 9, 2026

Simplified email address settings

Added subscription walls to gate archive content behind a subscription

Fixed a bug that allowed callers to create scheduled emails without publish dates
Fixed a bug with our unsubscribe_url checking to be more permissive with custom templates
Started rejecting usernames with non-ASCII characters
Added subscriberwall to only let subscribers read content
Cleaned up the branding docs

April 8, 2026

Added support for Estonian (thanks, Jakob!)
Fixed a typo in the documentation for snippets
Added a preflight checker for outdated copyright years
Fixed some misaligned empty state in /analytics
Added a new doc for account review
Bolstered the OpenAPI schema for automations
Fixed a bug with some of the API reference not auto-linking to the right types

April 7, 2026

Converted a few comparison guides to be calculators
Fixed a bug with serializing percentage-based coupons
Fixed a bug where automation drafts were silently failing
Improved the accessibility of the AM/PM buttons in the datetime picker (thanks, Ann!)
Removed the slight bonus we gave in firewall to freemail domains

April 6, 2026

Fixed a bug with overflow newsletter names on archives
Fixed a benign escaping bug with malformed surrogates
Updated the subprocessors list to remove AWS
Added a todo to nudge authors to turn on firewall if they get complaints during double opt-in

April 5, 2026

Started pinning featured emails to the top of the author app regardless of ordering
Tweaked the welcome email to use the custom subject, if present, to override "You're in!"
Added even more accessibility improvements
Improved performance of core sending + rendering engine through some file-level caching
Fixed bug where we were hard-failing when an import sent us invalid hex colors

April 4, 2026

Fixed bug where some bots were triggering magic link emails
Added the ability to turn on fingerprinting for embedded iFrames
Added the ability to bulk-change commenting_mode of emails
Fixed a bug where replies from the author were appearing in the subscriber detail view as if they were coming from the subscriber

April 3, 2026

Improved the schema for socials in /v1/newsletters.
Refactored and cleaned up the subscription form.
Added the ability to automatically mark subscribers as deliverable if their email changes in Stripe (thanks, David!)
Fixed a bug where metadata on subscribers from an embedded form wasn't getting cached properly (thanks, Alison!)
Fixed a bug with incorrect inbound reply attribution (thanks, Andrew!)
Improved the performance of the firewall
Fixed the bug where an inert subscribe button was showing up on private newsletters

April 2, 2026

Added a bunch of accessibility improvements
Improved the corpus of async work in a myriad of ways to raise all boats, as it were
Fixed bug where some newsletters with custom email templates had wonky in-app previews
Added the ability to toggle between archived and unarchived items in the inbox (thanks, Nadia!)
Started forwarding emails from foo@buttondown.email to the relevant newsletter authors as well via reply routing
Aligned icons and padding in the design system

April 1, 2026

Tweaked the copy on the billing page
Added a DPA link from the privacy policy
Fixed a benign error when fetching analytics for automations without actions
Improved the color consistency of the editor menu

March 31, 2026

Improved the Spanish translation
Surfaced Email.archival_mode in /v1/emails
Rewrote some of our auditing emails to be, well, better
Fixed a bug with incorrectly marking all subscribers in a batch as undeliverable
Improved the periodic report emails to be slightly more useful and ergonomic

March 30, 2026

Fixed a bug where old-style automations that referenced non-TypeID tags were failing to render (thanks, Michael!)
Added a new analytic for referrals (thanks, Andy!)
Added better error/invalidation states for automations
Bumped the global daily API rate limit by 10x for authors who have been permanently approved
Fixed a bug where we weren't sending the author-facing premium welcome email if they were transitioning directly from unactivated (thanks, David!)
Bolstered the building your subscriber base a bit

March 29, 2026

Fixed some issues with the subscribe modal on mobile (thanks, Westley!)
Fixed benign bug with /v1/attachments when passing malformed Android data
Removed an N+1 from /v1/emails
Tweaked the docs layout a bit
Added a stricter regex for color fields in the API

March 27, 2026

Moved around the whitelabeling toggle in Settings
Improved the OpenAPI spec to preserve nullable types in the API
Fixed some z-index issues in the core author-facing app
Fixed bug where we weren't pre-emptively gating tags behind the paywall in the frontend for paid subscriptions
Improved the styling of the Data settings page
Fixed issue for authors commenting when they had multiple permissions
Improved behavior of scrolling on drawers

March 26, 2026

Fixed a bug where competing bulk actions could get stuck
Added an example of using radio buttons in subscription forms
Got rid of /settings/domains and moved the inputs into the hosting and sending pages
Added Link headers to paginated API responses
Improved copy for the 100th subscriber milestone email

March 25, 2026

Bookshop.org embeds

Vended and rewrote littlefoot, our inline footnote provider
Added support for Bookshop embeds
Added support for Nepali as a supported locale for subscriber-facing content like archives
Renamed the design pages — "Archive design" is now "Web" and "Email design" is now "Email" — and moved them into their own /settings/design folder
Added rate limiting to magic links for privacy
Added the ability to set up custom click tracking domains via self-service

March 24, 2026

Fixed an edge case with slug uniqueness for emails coming from RSS-to-email
Cached DNS lookups for a minute to speed up the domains settings page
Formally removed the should_track_replies option — reply tracking is now always-on
Fixed a bug where you could turn off permissions on your own legacy API key
Added better billing flows for teams
Added inbound reply routing so [email protected] gets routed to the account owner
Fixed a broken button in automation detail drawers
Improved documentation around buttondown-editor-mode
Made reply tracking always-on for all newsletters — replies are now automatically tracked through Buttondown, so there's no toggle to worry about. If you have a custom reply-to address, that still takes priority.

March 23, 2026

Added support for one-time PWYW payments via the embedded checkout flow for paid subscriptions
Added create_gift_subscriber automation action
Resurfaced subscriber referrals setting in /settings/general for analytics
Tweaked magic link emails to not reference "managing subscriptions" if they were sent via paywall
Added the Firewall to magic links
Updated the cookie policy doc with specific timing information for privacy
Improved image resizing in Fancy Mode

March 22, 2026

Add support for aggregating emails based on open rate
Migrated core app to Vite 8

March 21, 2026

Updated the stack with various changes
Fixed a bug with the CLI incorrectly duplicating images
Fixed a bug with the announcement_bar_visibility schema type

March 20, 2026

Added support for saving subscriber filters as custom segments
Added stronger idempotence when creating new Stripe prices
Fixed a bug with newly created exports not being found
Added a firewall facet for comment text that looks spammy due to URLs
Fixed a bug with the rename metadata modal action
Improved the UX of stale filters when changing a trigger within automations
Turned on CSS inlining for everyone
Fixed a bug where we were flagging base64 content was potentially having prohibited keywords
Added a link from the survey drawer to any automations which reference it
Added support for detecting Netlify-proxied requests in the API

March 19, 2026

Added passwordless login via passkeys

Fixed bug where draft deliveries were being counted in analytics
Unshipped sharing_networks and started deriving it from an author's social links
Reorganized the email detail drawer
Moved advanced paid subscriptions settings into their own drawer
Fixed bug where embeds in Fancy Mode were autoexpanding on list items

March 18, 2026

Added a highlight affordance for various content addons in archives
Added a small FAQ about "guest customers" in Stripe
Improved rendering of nested comments in archives
Fixed some edge case jank with automations
Improved the design of /settings/data
Added a bespoke timepicker

March 17, 2026

Added bulk renaming of subscriber metadata keys

Added an annex to the Data Processing Agreement
Added PATCH /v1/images to change metadata after uploading
Fixed bug where the save tray wasn't handling archive navigation links correctly
Reorganized the blog categories a tiny bit
Combined the dark mode + light mode color variants for settings
Added the ability to choose blockquote styles
Added an A/B test for /pricing CTA
Redesigned /stack
Filtered out inoperational domains from subscriber imports
Fixed issue with dropping an image into the caption of another image

March 16, 2026

Refreshed and clarified all legal docs — DPA, privacy policy, sub-processor list, and cookie policy

Fixed the save button getting stuck when switching to or from Naked Mode
Fixed a few edge cases with Stripe price creation for paid subscriptions
Fixed a bug where absent values in PATCH requests were being treated as nulls in the API
Fixed issue where updates to subscribers were hanging on the clientside after navigating from search
Updated the legal docs
Fixed a bug with images refusing to scale down on Outlook Desktop
Added metadata to /v1/images
Fixed a bug with improper validation on transactional email templates
Added a constraint to PATCH /v1/emails that forbids empty bodies for non-draft emails
Fixed a bug where our draft sending was very naively detecting paywalls

March 15, 2026

Fixed bug when editing automations with the create_export action

March 14, 2026

Reordered comments to colocate replies
Gated setting custom domains via the API behind the paywall
Expanded the firewall to better detect Shannon entropy
Added background colors to archival theme customization
Improved the todo for migrating older API keys

March 13, 2026

Showed legacy API keys in /keys alongside the new adhoc keys
Fixed bug with firewall aggression being high for embedded iframes
Started requiring magic link access before viewing subscriber-specific archives
Fixed bug where portal dashboard was not respecting custom domains for newsletters
Improved the color picker even more

March 12, 2026

Improved blockquote readability in dark mode
Formally archived the GitHub roadmap
Started preserving referrer URL even with CAPTCHA resubmission
Fixed a bunch of meta descriptions
Improved Tidal integration
Fixed bug with premium unsubscriptions being overridden by webhook race conditions
Fixed bug with survey detail page not showing which emails it was sent in
Fixed bug where replies to drafts were not being tracked
Improved error message for invalid slugs
Fixed odd bug with malformed subscriber import metadata

March 11, 2026

Fixed imprecise time estimates when scheduling an email
Redesigned the automations flow to be more conducive for multi-step automations
Added an automation action for updating email visibility
Fixed some bad marketing site styling on mobile
Added a three day grace period when deleting newsletters
Added the ability to right-click on a row to pull up its options in /emails et al
Fixed a bug which allowed creating "sent" emails without a secondary_id
Fixed a bug where some subscribers were being omitted from the comments drilldown modal in analytics
Improved the inputs for archive footer/header
Improved the design of social inputs

March 10, 2026

Fixed the archives' hamburger button height
Improved the performance of batch checking many links
Shipped a new API version with safer defaults for sending emails
Fixed benign bug when browsing archives via the TikTok browser
Fixed bug where failed Bluesky crossposts were stuck as pending
Added frontend support for passkeys
Fixed bug with rendering previews for snippets in web
Added HTML support for some transactional emails

March 9, 2026

Added passkey support for two-factor authentication

Fixed bug with Newsletter.social that had “handle” instead of “url” somehow
Cleaned up the “about to send / sending” dialog
Fixed bug where we allowed you to remove the publish date from a scheduled email
Rebuilt the color picker

March 8, 2026

Fixed bug where /paid-subscriptions would show odd data for authors with >100 prices
Fixed lingering pay-per-email setup bug
Fixed bug where the auto-generated share image would sometimes get "stuck" on the original creation date
Improved styling of template variables in Fancy mode on mobile
Fixed bug where the CLI would no-op broken images whilst downloading

March 7, 2026

Changed email API defaults so POST to /v1/emails creates drafts instead of sending immediately

Added descriptions and examples to list filter fields in the OpenAPI spec
Added the ability to choose an API version when creating a new key
Fixed a bug where resubscribed subscribers still had an undeliverability_date
Fixed a bug where snippet previews were not showing up in emails
Started flagging when connected Stripe accounts had disabled payments
Fixed some jank in the 404 template for the classic theme
Fixed a bug where some replies to support conversations were showing up in the inbox as if they were from support

March 6, 2026

Improved sponsorship management flow a bit
Improved keyboard accessibility of the newsletter switcher
Fixed bug with route-based filtering in the API requests page

March 5, 2026

Added recovery codes as a backup for two-factor authentication

Publicly launched the new version of the API with TypeID
Fixed bug with very long archive import filenames
Fixed bug with parsing CSVs that had entirely blank columns

March 4, 2026

Fixed bug with JSON validation for Newsletter.socials
Improved the /keys drawer UI
Added the import date to the drawer for completed subscriber imports
Started sending attempted events when we send emails ad-hoc (such as bulk actions)
Fixed bug with unicode characters within custom buttons being rendered oddly

March 3, 2026

Added filtering sent emails by open rate, click rate, and delivery rate

Added support for recovery codes for 2FA
Added configure button to /settings/domains even if the domain is already set up correctly
Inlined the specific Archives settings so they're colocated with their toggle
Fixed bug where font changes weren't previewing correctly
Fixed bug where paywalls weren't previewing correctly for premium subscribers on web
Improved display of classic-theme emails in the editor whilst in dark mode
Replaced the inline MFA field with a distinct second screen
Fixed bug with rendering some Twitter URLs

March 2, 2026

Added a badge for custom buttons without custom URLs (thanks, Jacob!)
Added filtering in /emails by opens/clicks/deliveries
Fixed bug where fingerprinting in iFrames wasn't carrying over
Removed avatars from the RSS feed for this very page (thanks, Mark!)
Fixed bug where a few lifecycle emails didn't have an unsubscribe link
Stopped marking a domain as having an RSS feed if that domain just 307'd to Buttondown
Moved API version migration to a per-key level
Added tolerance to 2FA so you can take your time (h/t @mary)
Fixed bug with previewing older versions of CSS (h/t @mary)

March 1, 2026

Improved automation validation in external APIs
Fixed bug where we allowed you to create PWYW prices with identical minimum and maximum prices in paid subscriptions
Tweaked API rate limiting to count failures as well as successful requests
Added a slew of details to our OpenAPI spec
Tweaked magic link to reject email addresses without a matching subscriber
Improved the archive import success drawer
Reintroduced email.url template variable
Fixed bug in Beehiiv importer to handle smaller imports
Added stricter checking of imported subscribers against our existing ESP list
Fixed two edge case bugs with our CLI

February 27, 2026

Made newsletter metadata available in email templates via {{ newsletter.metadata }}

Improved visibility into why subscriber imports' rows are filtered out
Fixed bug where we allowed invalid automations to be created via API
Fixed bug where /home failed to load when a newsletter has pending sponsorships
Fixed bug introduced by Twitter in their batch tweet API

February 26, 2026

Breaking

Each action inside an automation now carries its own timing, paving the way for multi-step sequences in a single automation.

Added the ability to disconnect from SSO/password
Cut a new version of the API which allows parameterizing timing per-action
Added the ability to create new draft emails from old RSS items
Fixed bug with filtering emails in the API by -status
Fixed a smattering of broken images in docs
Added an activity item in /home for when your billing plan/status changes
Fixed bug where we asked you to supply a cadence for per-email pricing in paid subscriptions
Fixed benign NUL byte bug when storing unknown archive imports
When you downgrade from a paid plan to free, custom domains are now disabled (consistent with other features).

February 25, 2026

Fixed Apple Music embeds not working in the email preview—Apple now requires the name slug in embed URLs
Fixed 500 errors when previewing transactional emails (e.g. subscription confirmation) with invalid template syntax like empty variable tags in the Fancy Mode editor
Pushed back the paywall for RSS-to-email to activation, not creation
Added importing of arbitrary HTML blobs
Bumped up rate limit for Zapier users in good standing
Fixed bug with programmatically setting related emails for an email by slug via the API
Improved login CTA for paywalled content
Redesigned the search modal for the docs
Added an integration for Tidal
Added support for Apple Music embeds in a different format
Fixed clientside permissions issues for users with read-but-not-write subscribers permissions
Improved RSS-to-email creation flow
Fixed email-only paste handling in textareas

February 24, 2026

Cleaned up the automations UI
Added Firewall rule for penalizing email addresses which failed to subscribe to other newsletters

February 23, 2026

Added sorting and filtering subscribers by open and click rates

Improved UX for subscribing whilst authenticated as a subscriber to another newsletter
Improved various parts of the automations UI
Improved the copy of premium emails sent to paid subscribers
Fixed the janky styling of the forgotten password page
Fixed (hopefully!) another infinite-reload bug
Fixed a bug when navigating across integrations drawers
Improved performance of Fancy Mode editor
Added Firewall rules around common spammy patterns
Redesigned the security/account pages
Added the ability to filter comments by email or date

February 22, 2026

Finished cleaning up the docs
Improved the Archives marketing page
Fixed a remaining subset of CORS/preload issues
Retooled KYC messaging
Moved paid subscriptions to the sidebar if enabled
Added "other" fallback archive import for unbuilt importers
Fixed "alternatives" cards looking wonky
Slightly restyled comments
Fixed trivial timezone bug with Stripe subscriptions

February 21, 2026

Added custom click tracking domains so links route through your own sending domain

Added a big batch of new newsletter settings fields to the API

Started rolling out Cloudflare Turnstile on custom domains to reduce bot signups
Added embedded checkout to upgrade flows for paid subscriptions
Renamed "Archive design" to "Archives" for clarity
Exposed a bunch more newsletter settings to the public API
Added a bunch of FAQs to feature pages

February 19, 2026

Fixed one last R2 issue with the portal list page
Fixed a mismatch in newer Stripe API version cadences for paid subscriptions
Rebuilt the snippet editor to allow naked mode and be full page
Standardized some buttons in the manage subscription view and added a backlink
Added a new dynamic drilldown component for nested data
Added initial backend support for further webwall customization

February 18, 2026

Revamped reply tracking to be automatic and always-on

Emails that are scheduled rather than immediately sent now get hit with validators at schedule time rather than when they get published
Fixed bug where we were failing clientside to show a new paid subscription price after creating it
Added a better description for when you're missing your DMARC policy
Fixed a few benign API/validation bugs
Tweaked paid subscriptions behavior to just always mark the most recently created price as the default
Removed the duplicate email OutgoingEmailValidator and now just prompt for confirmation before sending
Improved OpenAPI schema for RSS feed endpoints
Bumped up css-inline which should fix some edge cases where inline styles were getting overridden

February 16, 2026

Made the full HTML email template editor self-serve for Professional plan users

Fixed bug with updating email addresses in the manage subscription page
Fixed bug with going from PWYW to non-PWYW if you already had a dormant PWYW price
Started rejecting email bodies that look like they have frontmatter since it's probably a mistake — creating or updating an email through the API returns a 400 with the code body_contains_frontmatter, which X-Buttondown-Live-Dangerously overrides
Fixed pagination bug with deliveries in the email analytics drilldown
Fixed bug with the CLI modifying irrelevant files
Fixed benign Unicode surrogate bug
Fixed benign bug in the automation analytics endpoint
Started vouching for email addresses that have old ESP suppressions if they complete double opt-in
Added subject line editing to Naked Mode
Added the ability to expand the subscriber import drawer to full width
Improved the timezone/locale input
Desensitized the RSS feed alerts
Fixed broken link in docs

February 15, 2026

Improved copy for empty state on /subscribers
Added auto-linking for type IDs in /requests
Added a generator meta tag for Simple Analytics
Added a confirmation step for deleting your account
Fixed bug with migrating your API version if you had many keys
Fixed bug with unsubscription events summary being different than the drilldown
Improved retry logic on emails which we had to backoff due to rate limiting

February 14, 2026

Simplified cancellation by merging pause and cancel into one action

Cleaned up the "getting started" docs
Debounced the number of times we update RSS subscriber count for a newsletter
GA'd custom email templates via the whitelabeling entitlement
Fixed bug with TypeID on embedded forms
Started warning people about API keys in frontend places

February 13, 2026

Allowed X-Buttondown-Live-Dangerously to bypass CORS in /v1/images
Cleaned up more blog post descriptions
Cleaned up more docs
Fixed 500 when passing invalid parameters to send-draft endpoint
Removed the ability to unsubscribe directly from the "portal dashboard"
Fixed bug with the CSS editor's current-line highlighting
Fixed bug where we were incorrectly showing blockquotes as dark mode in the preview
Fixed bug where we were not sending out invitations to older accounts that already existed
Fixed bug with inconsistent image sync in the CLI
Fixed bug where naked mode welcome emails still showed frontmatter
Fixed bug where we failed to sync authors in RSS feed with very long names
Started flagging default/placeholder alt text in the email validator
Added Obsidian to the /stack
Started setting unsubscription_date for imported unsubscribers
Fixed bug where we threw a 500 if you tried to aggregate by click/open date
Started surfacing support threads in the /inbox
Improved the subscription experience on mobile by turning the CTA into a modal
Fixed bug with LinkedIn social icons not being set
Moved social links from Archives to general settings because they're used for emails, too
Fixed the Integrations marketing page looking janky

February 12, 2026

Fixed bug where we were failing to parse reply-to-replies in Postmark
Improved the /changelog layout
Fixed a bug where we weren't showing KYC questionnaire to users who hadn't finished/skipped onboarding
Removed paused subscriptions and merged them into cancellations
Fixed bug where whitelabeling was not toggleable from the general settings
Fixed bug where Markdown versions of docs weren't resolving correctly

February 11, 2026

Added Swedish as a supported locale for subscriber-facing content
Fixed bug with double-conversion from cents-dollars for PWYW prices in USD
Added the ability to filter and send to subscribers based on open/click rate
Improved process of keeping author's sending email in sync when they add a new sending domain
Started truncating API requests to the past month rather than the past year
Started prompting folks who were referred by a friend/colleague to select the username for referral's purposes
Fixed display issue when we show null percentages

February 10, 2026

Added Swedish localization for subscriber-facing pages

Added a theme option to tweak size of blockquotes
Allowed passing in subscriber_id alongside POST /v1/comments
Fixed a bug where we missed a folder when uploading assets to R2
Exposed the per-subscriber open and click rates via the API

February 9, 2026

★ Started automatically parsing all Postmark and Mailgun emails for custom domains
Added X-Buttondown-Live-Dangerously to bypass SVG prohibitions in /v1/images
Added the ability to make certain images non-zoomable
Fixed bug with input validation on analytics endpoints
Started checking ESP suppressions in firewall
Fixed QR code visibility in dark mode
Added support for PWYW subscriptions with specific cadences
Added referral source autocompletion during onboarding
Fixed some jankiness with the test mode banner on emails
Removed the ability to unsubscribe unactivated subscribers
Polished and published /settings/data
Added syntax highlighting to code snippets in comments
Documented the X-Buttondown-Bypass-Firewall header
Cleaned up a few jank areas in Lovelace
POST /v1/comments now takes an optional subscriber_id, so a comment can be attributed to one of your subscribers rather than to you

February 7, 2026

Fix a broken doc and update a bunch more besides
Fix some broken images
Renamed css_tokens to theme_configuration
Fixed bug with double h1 on archive pages
POST /v1/images now rejects SVG uploads with a 400, since most email clients don't render them reliably — pass X-Buttondown-Live-Dangerously if the image is only ever bound for your archive

February 6, 2026

★ Migrated our static assets to be hosted on Cloudflare R2, reducing failures during deploys
Added basic metadata extraction + application for folks migrating from Substack/Beehiiv
Fixed a race condition with clientside currency conversion when setting up paid subscriptions
Fixed bug where we incorrectly failed to parse valid URLs with unicode in them when rendering Markdown
Fixed bug where we were proxying all SimpleAnalytics data onto our account
Added some more onboarding todos
Fixed bug where we weren't showing images in tracked replies
Fixed bug where export → Markdown wasn't working for individual emails
Ported the new date widget to /analytics
Standardized and cleaned up our context menu component
Improved reply HTML sanitization even more
Subscribers now report delivered_count, open_count, clicked_count, open_rate and click_rate, and you can sort or filter by the two rates when listing subscribers — the rates are null for anyone with no deliveries yet

February 5, 2026

Started prompting disabled users to provide socials
Started rejecting SVGs for newsletter icons b/c they break in emails
Started stripping as_embed param from magic link redirects so people don't get stuck in a tiny box
Migrated /v1/bulk_actions to use TypeID
Fixed bug where we asked people to supply KYC info even if they already had
Fixed some more edge cases with HTML in the /inbox
Cleaned up the footer for emails we send to premium subscribers

February 4, 2026

Added a cross-platform date picker
Fixed tiny bug where the link checker was flagging template tags like [Click here]({{ manage_subscription_url }})
Fixed bug where we weren't sanitizing HTML from emails in the inbox/conversation views
Improved editor toolbar on mobile
Fixed bug where sending an email via bulk action right after sending a draft could send the draft variant of the email
Changed the date-based cutoff for tracking domains to a flag-based one

February 3, 2026

Added public descriptions for tags, shown in the subscriber portal

Cleaned up a whole bunch of Archives docs
Migrated even more forms to use Formisch and a slightly revised design system
Added a few new lifecycle emails and removed stale ones that were dead code
Fixed benign bug in /v1/emails
Started deleting stale ESPSuppressions
Fixed bug where announcement bar was showing even in embedded subscribe forms
Fixed (hopefully) some transient deadlock/DB race conditions that were slowing down our asynchronous action runner
Fixed bug where we were asking disabled newsletters to submit KYC information even if they already had
Improved the storybook: better routing, a keyboard shortcut menu, and a request pane

February 2, 2026

Start exposing reasons why a subscriber is blocked by the firewall to authors
Start to require/add a custom CNAME for tracking domains for larger senders to derisk our own deliverability
Cleaned up a whole bunch of docs
We now have an admin action for ESPSuppression to allow removing/purging that suppression from the backing ESP
Fixed some broken links in our KYC disablement emails
Completely migrated off of DNSimple in favor of Cloudflare
Deleted a lot of old code (removed old dependencies, unused ESPs, etc.)
Migrated most forms to use Formisch and a slightly revised design system

January 31, 2026

Published an OpenAPI spec for the full archive template context

Migrated most forms to use Formisch and a slightly revised design system
Deleted a lot of old code (removed old dependencies, unused ESPs, etc.)
Completely migrated off of DNSimple in favor of Cloudflare
Fixed some broken links in our KYC disablement emails
We now have an admin action for ESPSuppression to allow removing/purging that suppression from the backing ESP
Cleaned up a whole bunch of docs
Start to require/add a custom CNAME for tracking domains for larger senders to derisk our own deliverability
Start exposing reasons why a subscriber is blocked by the firewall to authors

January 30, 2026

Made surveys work on web archive pages, not just in email

Removed redis requirement from demo to cut down on 500s

January 29, 2026

Fix bug where tags could not be programmatically set for certain weird billing cases
Fix bug where some automation actions had no label set for them
Fix bug where invoices were showing in $$$ regardless of currency
Fix bug where we allowed people to bypass the CSS billing constraints via API
Started running the email analytics cacher more often now that it's cheap

January 28, 2026

We now only see newsletters in the KYC queue if they've filled out the /home questionnaire after being disabled

January 27, 2026

Moved the Snippets API to be public and added support for it within the CLI
Fixed bug with validation of gift subscription metadata
Improved performance for in-app search
Improved performance for email event analytics

January 25, 2026

Added subscriber-editable tags so subscribers can manage their own tag preferences in the portal

Added granular API keys with per-key labels and permissions

Added a re-evaluate filters after delay option for automations

Merged in a change to embedded checkout to allow better plexing between monthly/annual
Redesigned callouts to be less visually chaotic
Refactored firewall for improved functionality/productivity

January 23, 2026

Reorganized design settings into separate archive and email design pages

Added reusable snippets that can be inserted into emails via the / command menu

Added initial (janky) support for surveys in the archives

January 22, 2026

Fixed bug where survey tags weren't validating properly within tiptap
Archive searches now respect quotes for exact matching
Added a subscriber_editable field to the tag object; a tag with it turned on shows up as a checkbox subscribers can toggle themselves in the portal

January 21, 2026

Added starred views for pinning pages to the sidebar

Bumped up mypy + django-stubs pretty heavily to yield some performance benefits

January 20, 2026

Added no-code archive customization — fonts, accent colors, link styling, and spacing

January 18, 2026

Added filtering to the notification inbox — All, Unread, and Needs Response views

January 17, 2026

Added Mastodon follower analytics to the dashboard

The mobile variant of dialogs now triggers at a narrower viewport
Expanded the TTL for Cleantalk responses from 3 to 30 days
Moved QR code generation serverside to fix bug where icons weren't being embedded

January 15, 2026

Migrated from ImprovMX to Cloudflare email workers for routing @buttondown.com
Disabled users are now prompted in-app to answer questions about their newsletters to help out KYC
Migrated some straggling domains' NS servers (but not ownership) from DNSimple to Cloudflare

January 12, 2026

Added POST /v1/subscribers/{id_or_email}/send-magic-link, which emails a subscriber a login link to their subscription management portal

January 10, 2026

Added two new archive themes: Arbus and Lovelace, a grid layout and a brutalist monospace option

Made custom buttons work in Markdown mode

Added Seline and Tinylytics as privacy-friendly analytics integrations for archives

Added the ability to unban subscribers directly from the UI

Added announcement bars for archive pages with markdown support and audience targeting

January 1, 2026

Breaking

Starting with API version 2026-01-01, responses return TypeIDs — UUIDs with a readable type prefix like sub_ or em_ — instead of bare UUIDs.

disposables.app

December 20, 2025

Russian localization

December 18, 2025

More locale options

December 14, 2025

Bluesky analytics

December 12, 2025

Reply to conversations

December 5, 2025

Randomize survey answer order

TK reminders in the editor

December 1, 2025

Scroll sync in the editor

November 28, 2025

Improved filters

November 25, 2025

Content Security Policy in archives

November 24, 2025

Open source Sniperl.ink

November 22, 2025

Auto-activating RSS reader subscriptions

November 19, 2025

Gift subscriptions

November 18, 2025

Template change history

November 17, 2025

Subscriber preview

November 15, 2025

Added an optional X-Buttondown-Test-Mode header to send-draft: the draft renders as if it were going to the subscribers you name, then gets redirected to you with a [TEST MODE] subject, which is a nice way to see what a gifted or tagged subscriber will actually receive

November 12, 2025

Notification inbox

November 7, 2025

Managed DNS

November 3, 2025

Analytics on /home

November 2, 2025

Send by engagement date

October 31, 2025

A cleaner paid subscriptions experience

October 30, 2025

Custom button colors

October 28, 2025

HMAC-based security for webhooks

October 21, 2025

Bulk notes

October 20, 2025

Drag-and-drop columns

October 15, 2025

Portal login

October 10, 2025

Emailwall and Webwall components

October 6, 2025

Newsletter QR code

October 1, 2025

Czech localization

September 27, 2025

UTM via forms

September 26, 2025

Better undeliverable heuristic

September 23, 2025

In what is the least impactful change in the history of Buttondown, raised the maximum length of an email's subject from 1000 to 2000 characters (and matched some related lengths, like RSS feeds and custom transactional emails)

September 22, 2025

Customizable checkout flows

September 20, 2025

Lifecycle-based emails

September 19, 2025

Paid churn tracking

September 18, 2025

Customize gift unsubscription notifications

Added a churn_date field to subscribers, recording when a paid subscriber churned, plus churn_date__start and churn_date__end filters when listing them

September 17, 2025

Firewall controls

September 16, 2025

Captcha

September 8, 2025

Notes everywhere

September 4, 2025

Suppressed emails

August 25, 2025

Dark mode

August 22, 2025

Better API errors

August 21, 2025

Smarter firewall

August 20, 2025

A new home screen

August 15, 2025

Cleaner email editor

July 28, 2025

Cleaner subscriber management

Breaking

The SubscriberType enum drops spammy, malformed and disabled; use undeliverable plus undeliverability_reason instead.

PWYW suggestions

July 15, 2025

More filtering options

July 13, 2025

Filter subscribers by source

July 4, 2025

Filter subscribers by domain

June 26, 2025

Dedicated archive settings page

Added a product field to the StripeSubscription schema: the name of the product a subscriber is subscribed to, which you can override by setting buttondown_template_facing_id metadata on the product in Stripe

June 23, 2025

Dormancy

June 21, 2025

Skip old RSS items

June 20, 2025

Referrals in the Portal

June 15, 2025

Email address changes

June 9, 2025

Featured emails

June 5, 2025

Safer bulk actions

June 3, 2025

Test mode

June 1, 2025

Playground

Breaking

GET /v1/emails now returns emails of every status instead of quietly defaulting to sent and in-flight ones.

May 30, 2025

The new /v1/attachments endpoint brings attachments — previously web-only — to the API.

CLI

May 27, 2025

Archive click tracking

May 26, 2025

Customizable exports

May 23, 2025

SimpleAnalytics integration

May 22, 2025

Revamped email draft flow

May 19, 2025

Breaking

The date, last_open_date and last_click_date filters on subscribers become explicit __start/__end pairs, like the rest of the API.

Newsletter exports can now be generated as JSON — pass the new format field when creating one, and CSV keeps working exactly as before

May 14, 2025

Analytics for sad stuff

Added css, web_css, icon, description and image to the Newsletter API, so you can restyle and rebrand a newsletter programmatically rather than only in the web app

May 9, 2025

Are.na sharing

May 1, 2025

Localization

April 21, 2025

Configurable Firewall

April 18, 2025

Suspicious activity detection

April 17, 2025

Activity filtering

Expanded the EmailStatus enum with throttled, resending and transactional: the first two just surface sending behavior that already existed, and the third covers emails sent by a core workflow or an automation

April 15, 2025

Automatic periodic exports

April 14, 2025

Expanded UTM filtering

March 31, 2025

Own tracking infrastructure

You can now pass an ip_address when creating a subscriber, which we use to work out their location and vouch for their legitimacy — handy for forms without CAPTCHA protection

March 25, 2025

Undeliverable handling

March 11, 2025

Engagement rates column

March 10, 2025

Tumblr auto-sharing

March 7, 2025

Cross-newsletter automations

March 1, 2025

RSS metadata

February 27, 2025

Image export

February 26, 2025

Added an undeliverability_date field to the Subscriber schema — think churn_date, but for permanent delivery failures — which you can filter and order by when listing subscribers

February 25, 2025

Button alignment options

February 19, 2025

Zapier v2.0

February 17, 2025

Pageviews by referrer

February 14, 2025

Redesigned subscriber detail pane

February 13, 2025

Self-serve referral settings

February 12, 2025

You can now pass a subject query parameter when listing emails; it's substring-based and case-insensitive, so Hello matches Hello world

February 9, 2025

Esoteric API features

February 6, 2025

We've removed legacy teasers

Breaking

should_send_teaser and custom_teaser are gone from the Email object; set the paywall in Email.body instead.

January 15, 2025

Header/footer variables

January 13, 2025

New analytic MRR

January 11, 2025

Transactional naked mode

January 5, 2025

Classic theme comments

January 2, 2025

Breaking

In what may be the most niche breaking change ever, the tag key in a bulk action's metadata is now tag_id.

Added an upgrade_date field to subscribers recording when someone upgraded to a paid subscription, and you can filter or sort by it when listing them

December 30, 2024

Breaking

We've unshipped is_comments_disabled from emails in favor of a more flexible commenting_mode field.

Webhooks for exports

December 17, 2024

Free/paid content blocks

December 14, 2024

You can now list all of your images with GET /v1/images, rather than only creating and deleting them by id

December 11, 2024

Creating a subscriber now rejects an address that already exists — even an unsubscribed one — to protect that subscriber's data and history; pass X-Buttondown-Collision-Behavior: overwrite or add when you want something more like an upsert

December 10, 2024

Bluesky profile embeds

Creating an export now takes parameters and columns, so you can pull just the email addresses and statuses of the subscribers who joined last week instead of every data point about every subscriber, ever

December 9, 2024

You can now filter subscribers by referrer_url when listing them, which a lot of you asked for after we added the same thing for IP addresses

December 5, 2024

Bluesky post embeds

Added support for filtering subscribers by IP address. A very niche feature, and we're glad to have it

November 26, 2024

Pausing your subscription

November 21, 2024

Discord webhook integration

November 18, 2024

Filter by survey response

November 8, 2024

Filtered exports

November 6, 2024

Umami integration

November 4, 2024

Per-email paid subscriptions

October 29, 2024

Multi-event webhooks

October 24, 2024

API idempotency keys

October 22, 2024

Internal links

October 17, 2024

Custom buttons

October 15, 2024

Framer component

September 30, 2024

Breaking

DELETE /v1/subscribers/{id_or_email} now deletes subscribers outright instead of unsubscribing them; PATCH with type: unsubscribed is the old behavior.

Send permission

September 18, 2024

Our new Open Source Funding Pledge

September 17, 2024

Zapier v1.8

September 1, 2024

Cross-post to Bluesky

August 28, 2024

Custom audiences

August 26, 2024

New demo site

August 22, 2024

Zapier v1.7

August 19, 2024

Subscriptions home

August 15, 2024

Breaking

We've combined included_tags and excluded_tags on emails into a single, composable filters field.

Filter by import

August 12, 2024

Cross-post to Twitter

August 9, 2024

Intuitive publishing flow

August 7, 2024

Zapier v1.6

August 5, 2024

Naked mode

August 1, 2024

Breaking

On subscribers, subscriber_type is now type and email is now email_address.

API versioning

July 29, 2024

New drafts interface

July 26, 2024

Apple and Simplecast embeds

July 15, 2024

Unsplash integration

July 13, 2024

Breaking

We've removed external_url from emails; canonical_url is the field you want.

Dashboard customization

July 1, 2024

Archive search

June 27, 2024

Breaking

Sending a draft through /v1/subscribers/{id}/emails now errors; use /v1/emails/{id}/send-draft instead.

Emoji autocomplete

June 21, 2024

Promoted /v1/survey_responses and /v1/events to top-level routes; they used to be sequestered under /surveys and /emails, so batching data across sources meant filtering on one survey or email at a time

June 19, 2024

Cross-post to LinkedIn

June 18, 2024

Subscriber autonomy

June 12, 2024

rel='me' support

June 11, 2024

LaTeX support

June 4, 2024

Open-sourcing our footnotes editor

May 29, 2024

New editor features

May 22, 2024

Easy footnotes

Added a subscriber_import filter to GET /v1/subscribers so you can pull just the subscribers from one import; import IDs come from the imports endpoints

May 21, 2024

Magic email images

May 19, 2024

Meta Pixel support

May 8, 2024

Slack webhooks

May 6, 2024

Rebuilt documentation site

April 29, 2024

Random content tag

April 20, 2024

Email yourself action

April 17, 2024

Improved search

April 15, 2024

Automation analytics

We're sponsoring PyCon

April 13, 2024

Better in-app previews

April 12, 2024

Transistor embeds

April 11, 2024

New analytic unsubscribe reasons

April 3, 2024

Comments dashboard

Launched /v1/comments, which lets you create, list and delete comments on emails

March 28, 2024

Changes to our stack in 2024

March 21, 2024

Fancy new editor mode

March 18, 2024

Comments RSS feed

March 15, 2024

Daily reports

March 14, 2024

Newer, nicer settings pages

March 12, 2024

Bluesky and Mastodon sharing

March 6, 2024

Analytics 3.0

February 28, 2024

Filter by coupon

February 20, 2024

Subscriber ID variables

February 19, 2024

Subscribers can tag themselves

February 5, 2024

Tags now get auto-grouped

January 29, 2024

Comments!

January 22, 2024

Send latest premium action

January 19, 2024

Better archives and landing pages

December 17, 2023

Automation filtering

December 13, 2023

Free API subscribers

December 12, 2023

Surveys in automations

December 8, 2023

Reply to replies

December 6, 2023

Labels for RSS feeds

November 29, 2023

Dear Tinyletter Users

November 21, 2023

Email vs web content

November 20, 2023

Sort by engagement

November 14, 2023

Better gift subscriptions

November 2, 2023

New email template

November 1, 2023

Email-based automations

October 30, 2023

Opt-in reply tracking

October 6, 2023

Automatic alt text

September 20, 2023

More social network integrations

September 19, 2023

Better automation analytics

September 18, 2023

Sort by metadata

September 16, 2023

Overlarge image warnings

September 14, 2023

Automation tag actions

September 12, 2023

Pause emails mid-flight

September 11, 2023

Search tags and automations

September 8, 2023

Gift via automations

September 5, 2023

Image captions

August 28, 2023

Subscriber-driving emails

August 23, 2023

Announcing django-typescript-routes

You can now filter by creation_date and publish_date when listing emails

August 21, 2023

Programmatic webhooks

August 14, 2023

Email page views

August 9, 2023

Tag statistics

July 23, 2023

Added utm_campaign, utm_medium and utm_source to subscribers; leave them out and we'll infer them from a provided referer_url

July 20, 2023

Discord webhook formatting

July 11, 2023

Buttondown pledges $5,000 to Outreachy

July 4, 2023

Automatic subscriber cleanup

June 27, 2023

RSS subscriber count

June 20, 2023

Weekly subscriber reports

June 19, 2023

More list columns

June 15, 2023

Customizable list views

June 8, 2023

Made-for-you share images

How we built made-for-you og:images

June 6, 2023

Automation improvements

May 31, 2023

End-of-email surveys

May 29, 2023

Filter by date

May 24, 2023

Survey-triggered automations

May 23, 2023

More automation functionality

May 22, 2023

New webhooks

May 19, 2023

Email as primary key

May 16, 2023

Automations

May 10, 2023

Confirmation reminders

May 9, 2023

Email churned subscribers

May 6, 2023

Email-to-draft

May 5, 2023

Subscriber metadata columns

May 1, 2023

ChatGPT integration

April 25, 2023

Faster web archives

April 24, 2023

Referral program

April 21, 2023

Better search results

April 20, 2023

TikTok embeds

April 13, 2023

Subscriber timeline

April 5, 2023

Spotify embeds

April 4, 2023

Improved RSS-to-email

March 29, 2023

Subscribe page OG image

March 28, 2023

New analytics page

March 24, 2023

Google Tag Manager

March 23, 2023

Even more subscriber types

March 21, 2023

Linktree integration guide

March 14, 2023

Advanced and enterprise plans

March 13, 2023

Framer integration guide

March 10, 2023

API requests page

March 4, 2023

Team collaboration

February 28, 2023

In-email surveys

February 17, 2023

Better CSS settings

February 16, 2023

Better RSS automation fetching!

February 7, 2023

Editor toolbar improvements

January 30, 2023

Smart filters

January 27, 2023

Faster emails page

January 23, 2023

RSS automations

January 19, 2023

Faster email analytics

January 17, 2023

Zapier error codes

January 16, 2023

Image accessibility checks

January 11, 2023

Tags vs newsletters

January 10, 2023

OG image picker

January 9, 2023

Image editor improvements

December 7, 2022

API bulk actions

December 6, 2022

Improved OpenAPI spec

December 1, 2022

Mastodon support

November 30, 2022

Better subscriber filtering

November 29, 2022

Better subscriber validation

November 28, 2022

Hotkey support!

November 24, 2022

Added /v1/emails/{id}/analytics, which returns aggregated opens, clicks and other events for an email you've sent

November 19, 2022

Breaking

/v1/drafts, /v1/scheduled-emails and /v1/unsubscribers are gone; /v1/emails and /v1/subscribers cover all three.

Programmatic access to analytics

November 7, 2022

Stronger bulk actions

November 2, 2022

Faster archive page

October 31, 2022

Custom canonical URLs

October 28, 2022

Email slug and metadata

October 27, 2022

Improved writing interface

October 19, 2022

Filter emails by source

October 18, 2022

Launched a glossary

October 17, 2022

Better list view filtering

October 12, 2022

Launched this very changelog

October 5, 2022

Prettier settings page

September 28, 2022

Marking past due subscribers

September 27, 2022

UTM source filtering

September 26, 2022

Descriptive export filenames

September 21, 2022

All your emails, in one place

September 14, 2022

Sort by tag

September 13, 2022

Programmatically gifting subscriptions

September 12, 2022

Resubscribe accidentally unsubscribed

September 8, 2022

Better email delivery reporting

September 5, 2022

More useful 404 pages

August 15, 2022

Fancier exports

July 17, 2022

Attach files to your emails

July 14, 2022

View webhook events

A better events view

July 8, 2022

File attachments

July 6, 2022

MFA support

June 13, 2022

Send teasers for paid newsletters

June 8, 2022

Buttondown's new pricing system

June 3, 2022

Premium teasers

March 23, 2022

Send archived emails to new subscribers

March 19, 2022

Send old emails

March 8, 2022

You can now filter on included_tags and excluded_tags when listing emails

February 6, 2022

Granular tracking settings

November 26, 2021

Took sending specific emails to subscribers out of beta, and added /v1/subscribers/{id}/send-reminder for nudging subscribers to confirm their email address