Thunderbird 17 is now available for download. Thunderbird is a free, open source, cross-platform e-mail and developed by the Mozilla Foundation.
What’s new in this version of thunderbird?
A Menu Button is now shown to new users by default
Tabs are now drawn in the title bar on Windows
Mac OS X 10.5 is no longer supported
An issue causing spell-checking only parts of words in Thunderbird 16
An issue causing Thunderbird 16 to repeatedly download emails
RSS feeds can now be viewed in the Wide View Layout
Various fixes and performance improvements
Various security fixes