Mozilla Thunderbird

As of July 2012, Thunderbird has transitioned to a new governance model, with new features being developed by the broader free software and open source community, and security fixes and improvements handled by Mozilla.

Thunderbird is a free, open-source, cross-platform e-mail and news (NNTP) client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a Web browser.

Fixed

• Embedded images not shown in email received from Hotmail/Outlook webmailer
• Detection of non-ASCII font names in font selector
• Attachment not forwarded correctly under certain circumstances
• Multiple requests for master password when GMail OAuth2 is enabled
• Large number of blank pages being printed under certain circumstances when invalid preferences were present
• Messages sent via the Simple MAPI interface are forced to HTML
• Calendar: Invitations can't be printed
• Mailing list (group) not accessible from macOS or Outlook address book
• Clicking on links with references/anchors where target doesn't exist in the message not opening in external browser
• Various security fixes

Known Issues

• Links in news messages including "remove all expired articles" not working