Thunderbird Release Notes

Version 52.5.0, first offered to channel users on November 23, 2017

Check out "What’s New" and "Known Issues" for this version of Thunderbird below. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla. If interested, please see the complete list of changes in this release.

System Requirements:
• Window: Windows XP, Windows Server 2003 or later
• Mac: Mac OS X 10.9 or later
• Linux: GTK+ 3.4 or higher

Details here.

Please refer to Release Notes for version 52.0 to see the list of improvements and fixed issues.

What’s New

  • new

    Better support for Charter/Spectrum IMAP: Thunderbird will now detect Charter's IMAP service and send an additional IMAP select command to the server. Check the various preferences ending in "force_select" to see whether auto-detection has discovered this case.

  • fixed

    In search folders spanning multiple base folders clicking on a message sometimes marked another message as read

  • fixed

    IMAP alerts have been corrected and now show the correct server name in case of connection problems

  • fixed

    POP alerts have been corrected and now indicate connection problems in case the configured POP server cannot be found

  • fixed

    Various security fixes