Thunderbird Notes

Version 52.4.0, first offered to Release channel users on October 6, 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

    In Thunderbird 52 a new behavior was introduced for replies to mailing list posts: "When replying to a mailing list, reply will be sent to address in From header ignoring Reply-to header". A new preference mail.override_list_reply_to allows to restore the previous behavior.

  • Fixed

    Under certain circumstances (image attachment and non-image attachment), attached images were shown truncated in messages stored in IMAP folders not synchronised for offline use.

  • Fixed

    IMAP UIDs > 0x7FFFFFFF not handled properly

  • Fixed

    Various security fixes