Mailspring

## 1.23.0 (7/19/2026)

Features:

- Added Office 365 shared mailbox support. (#2763) Thanks @Kevin-Hamilton!
- Added the ability to export folders to mbox files. (#2765) Thanks @Kevin-Hamilton!
- Added an option to count unread messages across all accounts. (#2779) Thanks @WebDevBar!
- Added a toggle for email render mode. (#2737) Thanks @AidanWarner97!
- Added an MCP server (off by default) that lets local agents interact with mail.
- On Linux, added a taskbar unread badge for KDE and other non-Unity desktops. (#2756) Thanks @WebDevBar!

Bug Fixes:

- Fixed a composer crash on quoted emails with inline images. (#2776)
- Fixed a composer crash when grammar-check decorations apply mid-composition. (#2775)
- Fixed missing Slate attributes on the IMAGE_TYPE fallback node. (#2774)
- Fixed a composer cut crash and suppressed Sentry noise from third-party plugins. (#2755)
- Fixed a crash when dragging threads to the sidebar after a thread is deleted. (#2760)
- Fixed a crash in `EventRSVPTask` when attendee ICS data goes stale. (#2770)
- Fixed a crash in the translation plugin when the iframe `contentDocument` is not yet loaded. (#2752)
- Fixed an onboarding crash when