# Mimestream changelog

> A native macOS email client built for Gmail and Google Workspace.

- Vendor: Mimestream
- Category: Communication
- Platforms: macOS
- Official site: https://mimestream.com
- Tracked by: What's New (https://whatsnew.fyi/product/mimestream)
- Harvested from: Update feed
- Entries below: 3 (newest first)

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

## Releases

### 1.10.6 — Version 1.10.6

- Date: 2026-07-29
- Version: 1.10.6
- Original notes: https://mimestream.com/appcast.xml
- Permalink: https://whatsnew.fyi/product/mimestream/releases/1.10.6
- Labels: Platforms: macOS

- **fixed** — Opening attachments sometimes results in an error on macOS 26.6
- **added** — Lightning-fast notifications with Mimestream Private Push, now enabled by default on macOS 26 and later
- **added** — Optional All profile to view all accounts in a unified inbox while keeping profiles organized
- **added** — Messages from unknown senders now show the sender's full email address inline
- **added** — Configurable notification banner action to choose Archive, Trash, or a menu of options
- **added** — What's New sheet to inform users about improvements
- **changed** — Adaptive cache management re-enabled by default for all users
- **changed** — Support for Google account email address changes
- **changed** — Use magic links to open Mimestream account management page without manual sign-in
- **changed** — Expanding synchronized range pulls in more messages
- **changed** — Improved throughput of Gmail API queries
- **changed** — New top-level settings tab for Notifications
- **changed** — New top-level settings tab for Profiles
- **changed** — Text size setting can now go larger than before
- **changed** — Tracking prevention improved to pass all emailprivacytester.com tests
- **changed** — Accounts can now have None as a profile selection
- **changed** — Each label now maintains a separate sync window, solving longstanding message list consistency issues when Adaptive Cache Management is enabled
- **fixed** — Typed content in some drafts fails to save in rare circumstances
- **fixed** — Messages don't appear in the Primary Inbox when they have multiple category labels
- **fixed** — Opening a pre-existing draft can get stuck with a Downloading overlay in rare circumstances

This update contains an important compatibility fix for macOS 26.6.
Lightning-fast notifications with Mimestream Private Push
Get lightning-fast notifications of new email with Mimestream Private Push, now enabled by default on macOS 26 and later. Its privacy-focused architecture means our service never receives your Google OAuth credentials and cannot read your email or see message content.
If an account needs to be upgraded, open Settings and Mimestream will guide you through it. [Learn more about Private Push](https://mimestream.com/trust/private-push) in our Trust Center.
Optional “All” profile
Mimestream has always let you choose between seeing all of your accounts in a unified inbox or keeping them separated with profiles. With the new optional All profile, you can do both: keep your profiles organized and switch to All whenever you want a unified view.
See addresses for unknown senders
Messages from unknown senders now show the sender’s full email address inline, so it’s easier to see who’s writing.
Configurable notification banner action
Choose the default action for notification banners, including Archive, Trash, or a menu of options.
🚀 Other New Features
- Added a "What's New" sheet to inform users about improvements
✨ Improved
- Adaptive cache management re-enabled by default for all users
- Support for Google account email address changes
- Use magic links to open Mimestream account management page without manual sign-in
- Expanding synchronized range pulls in more messages
- Improved throughput of Gmail API queries
- New top-level settings tab for Notifications
- New top-level settings tab for Profiles
- The text size setting can now go larger than before
- Tracking prevention improved to pass all emailprivacytester.com tests
- Accounts can now have "None" as a profile selection
- Each label now maintains a separate sync window, solving longstanding message list consistency issues (when "Adaptive Cache Management" is enabled in Advanced settings)
🔧 Fixed
- (macOS 26.6) Opening attachments sometimes results in an error
- Typed content in some drafts fails to save in rare circumstances
- Messages don't appear in the Primary Inbox when they have multiple category labels
- Opening a pre-existing draft can get stuck with a Downloading overlay in rare circumstances
- Selecting a folder with an insufficient number of visible threads doesn't automatically expand the synchronized range
- The "Join Google Meeting" link renders twice on load
- Signing in to a Google account can fail with a vague "Unable to connect" error
- Drafts can go into infinite syncing loop
- Some messages don't reformat correctly in dark mode
- Category inbox toggles jumble around during the onboarding transition animation
- Inbox unread counts sometimes get stuck and stop updating
- Sharing videos to Mimestream sometimes fails
- Order of attachments in quicklook preview panel doesn't match message
- Some names aren't parsed correctly for the message list recipient list
- When sending to an Apple Contacts Group, preferred address isn't respected
- Crash when opening messages from notifications
- Forwarding messages may not include attachments that haven't completed downloading yet
- Signature content entered in the new signature sheet sometimes isn't saved
- Per-message context menu doesn't have a way to forward as attachment
- Conversation keeps jumping to top when scrolling down while message is still loading
- Subscription view sometimes missing the Purchase button
- Unified Inbox doesn't show enough content after upgrading to 1.10
- Inbox unread counts may be incorrect when no categories are enabled
- Clicking on a new message notification can result in message being auto-deselected
- Selected message gets deselected in Inbox with Unread filter enabled
- Beginning a search dispatches redundant queries
- Sending feedback crashes when there are no enabled accounts
- High CPU utilization when refreshing the message list with a large cache
- High CP

_[Truncated at 4000 characters — full notes: https://mimestream.com/appcast.xml]_

### 0.41.6 — Version 0.41.6

- Date: 2023-03-27
- Version: 0.41.6
- Original notes: https://mimestream.com/appcast.xml
- Permalink: https://whatsnew.fyi/product/mimestream/releases/0.41.6
- Labels: Platforms: macOS

- **fixed** — Changing the font size in the compose window on macOS 13.3 now works
- **fixed** — Spacebar scrolling in conversation view on macOS 13.3 now works
- **fixed** — Mimestream no longer crashes due to a Gmail API change
- **fixed** — Addresses now tokenize correctly after pressing tab
- **fixed** — Mentions now work when there is a plus sign earlier on the line
- **fixed** — App no longer crashes when displaying messages without a From header
- **fixed** — Label picker now has keyboard focus when opened
- **fixed** — Visual artifacts no longer appear when swiping on a message list row on macOS 13
- **fixed** — Text in the Label picker is now properly aligned on macOS 13
- **fixed** — Copy Gmail URL now copies the URL correctly
- **fixed** — Snoozed messages now unsnooze at the correct time
- **fixed** — Mid-sentence mentions now work
- **fixed** — Keyboard arrow keys now scroll in the standalone window
- **fixed** — Category folder added to Favorites now has a Remove from Favorites button
- **fixed** — Window title is updated after renaming a label
- **fixed** — Signature popup now updates when changing the From account
- **fixed** — Expanded folder shows badge count on refresh
- **fixed** — Localization now works for the Prevent Tracking preference
- **fixed** — Settings panes no longer wrap incorrectly in non-English localizations

We’re putting the final finishing touches on Mimestream 1.0! Until then, this update fixes regressions introduced by macOS 13.3, and is compatible with macOS 11+.
We’ve been busy getting Mimestream 1.0 ready – details coming soon! In the meantime, we have some assorted improvements and bug fixes.
✨ Improved
- Revised appearance for the “Draft” indicator in the message list
- Mentions can now autocomplete contacts from the Workspace directory
- Better user-facing alerts when encountering authorization errors
- Preparations for the upcoming 1.0-beta.1 build
- New appearance for “Draft” messages in list
- Cycle through Unified folder subfolders by repeating the shortcut
- Show the Templates toolbar button for feature discoverability
- Revised recipient autocomplete suggestion scoring algorithm
🔧 Fixed
- (macOS 13.3) Changing the font size in the compose window doesn't work
- (macOS 13.3) Spacebar doesn't scroll conversation view
- Mimestream crashes due to a Gmail API change
- Addresses sometimes don't tokenize after pressing tab
- Mentions don't work if there is a “+” earlier on the line
- Crash when displaying messages without a From header
- Label picker sometimes doesn't have keyboard focus when opened
- (macOS 13) Visual artifacts when swiping on a message list row
- (macOS 13) Text in the Label picker is misaligned
- Crash when displaying messages without a From header
- Copy Gmail URL doesn't copy the URL
- Snoozed messages sometimes don't unsnooze at the correct time
- Mid-sentence mentions don't work
- Cannot scroll with keyboard arrow keys in the standalone window
- Category folder added to Favorites doesn't have a “Remove from Favorites” button
- After renaming a label, the window title isn't updated
- Signature popup sometimes doesn't update when changing the From account
- Highlight label colors on hover in menus and picker popovers
- Expanded folder shows badge count on refresh
- Localization doesn't work for the “Prevent Tracking” preference
- Settings panes can wrap incorrectly in non-English localizations
- Broken selection restoration when no folder was selected
- Error message lacks detail when app doesn't have permission to access Contacts
- Crash when selecting “Don't Allow” access to Contacts
- Broken appearance after copying text from messages that support dark mode
- Search field shouldn't allow formatting of text via shortcuts
🧹 Cleanup
- Inform macOS 11 users that subsequent updates will require macOS 12+
- Tweak alignment of Google service checkboxes
- Tweak sizing of header buttons
- Improvements and bug fixes for alpha features

### 0.35.6 — Version 0.35.6

- Date: 2022-09-04
- Version: 0.35.6
- Original notes: https://mimestream.com/appcast.xml
- Permalink: https://whatsnew.fyi/product/mimestream/releases/0.35.6
- Labels: Platforms: macOS

- **added** — Create multiple alternate signatures
- **added** — Per-account Categorized Inbox settings
- **added** — Emoji substitutions when composing
- **added** — Send to labels/groups from Google Contacts
- **added** — Template subjects, To/Cc/Bcc fields, and formatting
- **added** — Forward messages as attachments
- **added** — Date suggestions in the search field
- **added** — Show the Apple Contacts card for an address token
- **added** — Configure which calendars from Apple Calendar are displayed in the invitation banner
- **added** — Swipe action options for Label and Move To
- **added** — Reorder attachments in the compose window via drag and drop
- **added** — Not Spam context menu item to the message list
- **changed** — The Mark all as Read button is now shown even when the message list is filtered
- **changed** — Sharing images now inserts them inline, so they can be resized
- **changed** — The Calendar banner now shows recurring event details
- **changed** — The Calendar banner now has meeting-join links
- **changed** — Improved autocomplete suggestion orderings
- **changed** — Trash and Spam folders now have context menu items to permanently erase all items when selected
- **changed** — Ability to drag messages and drop onto a label with the option key to add that label
- **changed** — When replying and quoting only selected text, default to a bottom-post initial cursor position
- **fixed** — Windows don't open on macOS Catalina after the beta build expiration date
- **fixed** — Slow receipt of new email and battery drain for some Google Workspace accounts due to an infinite synchronization loop
- **fixed** — Can't tab from subject to body when there are no signatures
- **fixed** — Body text gets erased when changing From or signature when using the preference to place signatures below quoted text
- **fixed** — Crash when replying to messages with duplicated images
- **fixed** — Crash when using the message list filter on macOS 11
- **fixed** — Crash when displaying some Apple calendar events in the invitation banner
- **fixed** — Crash when entering specific non-ASCII text into the search field
- **fixed** — The signatures popup can be misaligned with only 1 account
- **fixed** — The header of the compose window sometimes has extra padding
- **fixed** — Hiding the Drafts label from the sidebar immediately reverts
- **fixed** — The ellipsis button to expand quoted text doesn't work on macOS 10.15
- **fixed** — The message list filter sometimes gets enabled automatically after changing folders
- **fixed** — The calendar banner can't load events if the Add invitations to my calendar Google Calendar setting isn't set to From everyone
- **fixed** — The calendar banner shows declined events as conflicts
- **fixed** — Replying to a message sometimes only quotes attachment name
- **fixed** — The Edit Labels popover doesn't work if the selection is scrolled out of view
- **fixed** — Inserting attachments with certain MIME types such as fonts fails
- **fixed** — Labels named Personal sometimes disappear from the sidebar
- **fixed** — Can't attach files over 20MB even though the Gmail limit is 25MB
- **fixed** — When replying to a message, images in the quoted text aren't resized by default
- **fixed** — Unread counts aren't updated correctly for child labels in the favorites section
- **fixed** — Can't share screenshots to Mimestream from the macOS screenshot markup window
- **fixed** — Can't autocomplete to a Reply-To address from received email
- **fixed** — Changing the From address in a Send Again compose window can delete non-signature text content
- **fixed** — Crash on launch restoring a reply window when the parent message has been permanently deleted
- **fixed** — GitHub notification threads randomly change subject/snippet in the message list after being read
- **fixed** — Sharing from Apple Maps/News results in duplicate compose windows
- **fixed** — The Go > Next Category Inbox menu item switches in random order
- **fixed** — Blank compose windows don't restore after relaunch with state restoration
- **fixed** — Automatic next row selection doesn't happen when deleting or archiving multiple rows
- **fixed** — Can't drag attachments out of the compose window header
- **fixed** — Autocomplete should prioritize Apple/Google Contacts display names for addresses
- **fixed** — Signing into Google Contacts doesn't dismiss the sign-in sheet
- **fixed** — The Gmail Template warning's More Info button doesn't work
- **fixed** — The filter toolbar button doesn't update state immediately when switching folders
- **fixed** — Clicking in padding of a collapsed message doesn't expand it
- **fixed** — The Image Size popup shouldn't allow selecting sizes that have no effect
- **fixed** — Show Sending and other activities above login failure errors in the status tray
- **fixed** — Non-inline attachments list shouldn't show a .gif file that was attached inline
- **fixed** — Handle Calendar API authentication failures and prompt to re-authenticate
- **fixed** — Automatic insertion of a numbered list shouldn't change the starting number of a previous list
- **fixed** — Enforce the attachment size limit for the Insert from File option
- **fixed** — The calendar banner sometimes shows duplicate attendees
- **fixed** — The calendar banner should not show for messages sent to aliases, because these events can't be loaded from the Calendar API
- **fixed** — The calendar banner doesn't immediately update after connecting Apple Calendar
- **removed** — Disables the beta build expiration

This final update for macOS 10.15 Catalina disables the beta build expiration.
Future updates to Mimestream will only be available on macOS 11 or newer.
🚀 New
- Create multiple alternate signatures
- Per-account “Categorized Inbox” settings
- Emoji substitutions when composing
- Send to labels/groups from Google Contacts
- Template subjects, To/Cc/Bcc fields, and formatting
- Forward messages as attachments
- Date suggestions in the search field
- Show the Apple Contacts card for an address token
- Configure which calendars from Apple Calendar are displayed in the invitation banner
- Swipe action options for “Label” and “Move To”
- Reorder attachments in the compose window via drag and drop
✨ Improved
- The “Mark all as Read” button is now shown even when the message list is filtered
- Added a “Not Spam” context menu item to the message list
- Sharing images now inserts them inline, so they can be resized
- The Calendar banner now shows recurring event details
- The Calendar banner now has meeting-join links
- Improved autocomplete suggestion orderings
- When selected, the Trash and Spam folders now have context menu items to permanently erase all items
- Ability to drag messages and drop onto a label with the option key to add that label
- When replying and quoting only selected text, default to a bottom-post initial cursor position
- Templates can now substitute more variables
- New “Account Added” view prompting input of an account name
🔧 Fixed
- Windows don't open on macOS Catalina after the beta build expiration date
- Slow receipt of new email and battery drain for some Google Workspace accounts due to an infinite synchronization loop
- Can't tab from subject to body (when there are no signatures)
- Body text gets erased when changing From (or signature) (when using the preference to place signatures below quoted text)
- Crash when replying to messages with duplicated images
- Crash when using the message list filter on macOS 11
- Crash when displaying some Apple calendar events in the invitation banner
- Crash when entering specific non-ASCII text into the search field
- The signatures popup can be misaligned (with only 1 account)
- The header of the compose window sometimes has extra padding
- Hiding the Drafts label from the sidebar immediately reverts
- (macOS 10.15 only) The ellipsis button to expand quoted text doesn't work
- The message list filter sometimes gets enabled automatically after changing folders
- The calendar banner can't load events if the “Add invitations to my calendar” Google Calendar setting isn't set to “From everyone”
- The calendar banner shows declined events as conflicts
- Replying to a message sometimes only quotes attachment name
- The “Edit Labels” popover doesn't work if the selection is scrolled out of view
- Inserting attachments with certain MIME types (e.g. fonts) fails
- Labels named “Personal” sometimes disappear from the sidebar
- Can't attach files over 20MB even though the Gmail limit is 25MB
- When replying to a message, images in the quoted text aren't resized by default
- Unread counts aren't updated correctly for child labels in the favorites section
- Can't share screenshots to Mimestream from the macOS screenshot markup window
- Can't autocomplete to a Reply-To address from received email
- Changing the From address in a “Send Again” compose window can delete non-signature text content
- Crash on launch restoring a reply window when the parent message has been permanently deleted
- GitHub notification threads randomly change subject/snippet in the message list after being read
- Sharing from Apple Maps/News results in duplicate compose windows
- The “Go > Next Category Inbox” menu item switches in random order
- Blank compose windows don't restore after relaunch with state restoration
- Automatic next row selection doesn't happen when deleting or archiving multiple rows
- Can't drag attachments out of the compose window header
- Autocomplete should prioritize Apple/Googl

_[Truncated at 4000 characters — full notes: https://mimestream.com/appcast.xml]_