Release Notes

New mail alert now includes message disposition buttons

New mail notification customization added to macOS Settings

Changed color override defaults with high contrast mode on macOS and Linux

macOS notifications displayed two logos

Message preview truncation in notifications improved

Wrong day of week displayed for some emails

In dark mode with light theme, message reader still displayed in dark mode

Message link and text colors were incorrect when using Dark Reader

Unchecking "Show all headers" in Message Header Settings closed dialog

Address book did not match users when case differed in some instances

Menu items to manage folders were not disabled in offline mode

Using Delete column in "Search Messages..." window could delete other messages

Ctrl or Shift selecting multiple messages reset when dragging across a message

Newsgroups could no longer be re-ordered in the folder tree via drag and drop

Windows users with non-ASCII folder names and profile paths could not view emails

OpenPGP key was not updated when accepted key was reimported with new identities

Dual signed (PGP and S/MIME) emails were not displayed

Notification duration preference enabled when system notifications were enabled

Thunderbird could crash when adaptive message filtering was enabled

CardDAV synchronization to Zimbra server failed

Keyboard navigation was not possible when first header button was disabled

Folders missing from view when "Show only subscribed folders" was not selected

Nickserv messages appeared during successful authentication

Global indexing failed when processing email with invalid calendar data

Clicking a mid: link in Calendar opened two copies of the message

Some calendar requests were blocked due to opaque response blocking

Visual and UX improvements

Security fixes