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

• Google Oauth setup can sometimes not progress to the next step
• Background images not working and other issues related to embedded images when composing email
• Various security fixes

Known Issues

• Crash when compacting IMAP folder
• Crash due to incompatibility with McAfee Anti-SPAM add-on (Workaround: Start in safe mode and disable McAfee Anti-Spam extension)
• Large attachments may not be shown or saved correctly if the message is stored in an IMAP folder which is not synchronized for offline use (Workaround: Set preference browser.cache.memory.max_entry_size to the value of -1 (unlimited) and create integer preference browser.cache.memory.capacity with the value of 200000 (200 MB, 25 MB per message)
• Unable to load full message via POP if message was downloaded partially (or only headers) before
• Large number of blank pages being printed under certain circumstances
• Some attachments can't be opened or saved if the message body is empty