Thunderbird Beta Notes

Version 59.0beta, first offered to channel users on March 1, 2018

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.

These release notes apply to Thunderbird version 59 beta 2 released March 1st, 2018.

What’s New

  • new

    Further improvements to reordering attachments (introduced in Thunderbird 58 beta), including reordering by drag & drop

  • new

    Edit Template command. This also solves various problems when saving as template (duplicates created, message ID lost).

  • new

    Calendar: Option to select the target calendar when pasting an event or task

  • changed

    Add-on options can no longer be configured from the Add-on Manager page. A new menu item "Add-on Options" is now available on the Tools menu.

  • changed

    When customizing the From: address, Thunderbird will now use this address for the SMTP "MAIL FROM" command. Previously the address configured in the identity was used. The preference mail.smtp.useSenderForSmtpMailFrom allows return to the previous behavior.

  • changed

    Various updates to the Thunderbird theme. Thunderbird now uses Photon Icons.

  • changed

    Calendar: Reminders on read-only calendars can now be dismissed, while reminders for missed events will now only be displayed for writable calendars if option "Show missed reminders for writable calendars" is selected

  • fixed

    Various problems related to handling the IMAP trash folder: Under certain circumstances the selection of the trash folder didn't persist, for example when the name contained non-ASCII characters, or in localized versions of Thunderbird. At times unwanted additional trash folders were created. Selection of a trash folder didn't give immediate visual feedback.

  • fixed

    Searching message bodies of messages in local folders, including filter and quick filter operations, did not find content in message attachments

  • fixed

    Shared IMAP folders not shown in subscribe dialog under some circumstances

  • fixed

    Improvements encoding/decoding message headers

  • fixed

    Calendar: Wrong time formatting for some time zones

Known Issues

  • unresolved

    The IMAP and News subscribe dialogue now presents a flat list of folders instead of a folder tree. This will be restored to its original form in the next release.