Fixed:

• Application crashed on Pixel 10 Pro when returning to message list
• Account avatar monograms reverted to initial account name and could not be renamed

Contributors:

• Thanks to @wmontwe

Full Changelog: THUNDERBIRD_16_0b2...THUNDERBIRD_16_0b3

Fixed:

• Application crashed at startup
• Fix various edge-to-edge issues throughout the app

Contributors:

• Thanks to @wmontwe

Full Changelog: THUNDERBIRD_16_0b1...THUNDERBIRD_16_0b2

New:

• Enable Memory Tagging Extension on MTE-capable devices to improve memory safety
• Add setting to control default folder expansion behavior
• Add the ability to switch between text/plain and text/html display

Fixed:

• Switching folders required an excessive number of clicks
• Fix various edge-to-edge issues throughout the app

Contributors:

• @tenzap made their first contribution in #10037
• Thanks also to @wmontwe, @coreycb, @shamim-emon, @rafaeltonholo, @tenzap, @liutikas, @krzysdz

Full Changelog: THUNDERBIRD_15_0b1...THUNDERBIRD_16_0b1

New:

• Drop-down drawer is now enabled

Fixed:

• 'Auto-fit messages' display setting did not persist
• Edge-to-edge regressed moving/copying message with 3-button navigation
• Unified Account was displayed when there was only one account
• Swiping message left or right with slight downward motion aborted prematurely
• Crash occurred when setting archive folder via swipe after it was set to None
• Outlook SMTP failed to authenticate for enterprise or educational accounts
• Gmail folder prefixes appeared after refreshing folder list
• During account setup, 'Your Name' field was mislabeled as 'Display Name'
• Quiet time preferences were ignored
• Thunderbird could crash when deleting an account and returning to the message list

Contributors:

• @vivganes made their first contribution in #9695
• @krzysdz made their first contribution in #9640
• Thanks also to @shamim-emon, @rafaeltonholo, @wmontwe, @sergiolpzgmz, @kewisch, @coreycb, @asoucar, @stephenking314

Full Changelog: THUNDERBIRD_13_0...THUNDERBIRD_14_0

New:

• Drop-down drawer is now enabled

Fixed:

• 'Auto-fit messages' display setting did not persist
• Edge-to-edge regressed moving/copying message with 3-button navigation
• Unified Account was displayed when there was only one account
• Swiping message left or right with slight downward motion aborted prematurely
• Crash occurred when setting archive folder via swipe after it was set to None
• Outlook SMTP failed to authenticate for enterprise or educational accounts
• Gmail folder prefixes appeared after refreshing folder list
• During account setup, 'Your Name' field was mislabeled as 'Display Name'
• Quiet time preferences were ignored
• Thunderbird could crash when deleting an account and returning to the message list

Contributors:

• @vivganes made their first contribution in #9695
• @krzysdz made their first contribution in #9640
• Thanks also to @shamim-emon, @rafaeltonholo, @wmontwe, @sergiolpzgmz, @kewisch, @coreycb, @asoucar, @stephenking314

Full Changelog: K9MAIL_13_0...K9MAIL_14_0

New:

• Add avatar to message list content
• Enable in-app notifications for beta
• In-app error notification improvements

Changed:

• Default sync interval has been changed from 60 minutes to 15 minutes
• Introduce warning in Message Compose screen when no sent folder is detected
• Add confirmation dialog for sending a message without a sent folder
• Use application icon in push notification messages

Fixed:

• 'Colorize contact pictures' default changed unexpectedly from true to false
• Displaying IMAP password in plain text did not prompt for authentication
• Sync debug logger did not write any logs

Contributors:

• @thgoebel made their first contribution in #9820
• @IsakTheHacker made their first contribution in #10075
• @liutikas made their first contribution in #10094
• Thanks also to @coreycb, @Goooler, @IsakTheHacker, @kewisch, @liutikas, @rafaeltonholo, @shamim-emon, @SttApollo, @thgoebel, @wmontwe

Full Changelog: THUNDERBIRD_14_0b3...THUNDERBIRD_15_0b1

Fixed:

• Thunderbird could crash when deleting an account and returning to the message list

Contributors:

• Thanks to @wmontwe

Full Changelog: THUNDERBIRD_14_0b2...THUNDERBIRD_14_0b3

Fixed:

• Messages could not be fetched in 14.0b1

Contributors:

• Thank you to @rafaeltonholo, @wmontwe

Full Changelog: THUNDERBIRD_14_0b1...THUNDERBIRD_14_0b2

Changed:

• Sync logging duration is now limited to 24 hours

Fixed:

• Client certificate was not displayed in SMTP settings
• Outlook headers included unnecessary newlines when replying to a message
• "Enable debug logging" did not provide verbose logging
• Scrolling in a short email could trigger left/right swipe
• Landscape scrolling only worked in center of Welcome and New Account screens
• On IMAP servers with folder prefixes, some folder operations stopped working
• Reverted word-wrapping change that broke HTML and table rendering
• Application crashed when opening placeholder folder

Contributors:

• @dandarnell made their first contribution in #9439
• @benkibbey made their first contribution in #9449
• @NWuensche made their first contribution in #9577
• Thank you also to @arnt, @asoucar, @coreycb, @joohnq, @rafaeltonholo, @shamim-emon, @stephenking314, @terofeev, @wmontwe

Full Changelog: THUNDERBIRD_12_1...THUNDERBIRD_13_0

Changed:

• Sync logging duration is now limited to 24 hours

Fixed:

• Client certificate was not displayed in SMTP settings
• Outlook headers included unnecessary newlines when replying to a message
• "Enable debug logging" did not provide verbose logging
• Scrolling in a short email could trigger left/right swipe
• Landscape scrolling only worked in center of Welcome and New Account screens
• On IMAP servers with folder prefixes, some folder operations stopped working
• Reverted word-wrapping change that broke HTML and table rendering
• Application crashed when opening placeholder folder

Contributors:

• @dandarnell made their first contribution in #9439
• @benkibbey made their first contribution in #9449
• @NWuensche made their first contribution in #9577
• Thank you also to @arnt, @asoucar, @coreycb, @joohnq, @rafaeltonholo, @shamim-emon, @stephenking314, @terofeev, @wmontwe

Full Changelog: K9MAIL_12_1...K9MAIL_13_0