Thunderbird is a free, open-source, cross-platform application for managing email and news feeds. It is a local (rather than a web-based) email application that is powerful yet easy-to-use. Thunderbird is developed, tested, translated and supported by the folks at Mozilla Corporation and by a group of dedicated volunteers. Thunderbird gives you control and ownership over your email. There are lots of add-ons available for Thunderbird that enable you to extend and customize your email experience.

Thunderbird gives you IMAP/POP support, a built-in RSS reader, support for HTML mail, powerful quick search, saved search folders, advanced message filtering, message grouping, labels, return receipts, smart address book LDAP address completion, import tools, and the ability to manage multiple e-mail and newsgroup accounts.

Changes in Thunderbird 78.1.1:

  • Building OpenPGP shared library linked to system libraries now supported
  • MailExtension errors now shown in Developer Tools console by default
  • MailExtensions: Dynamic registration of calendar providers now supported


  • OpenPGP improvements
  • Message preview was sometimes blank after upgrading from Thunderbird 68
  • Email addresses whitelisted for remote content not displayed in preferences
  • Importing data from Seamonkey did not work
  • Renaming a mail list did not update the side bar
  • MailExtensions: messenger.* namespace was undefined

Known issues:

  • Mail header toolbar (Reply, Forward, Archive, Junk buttons) no longer configurable
  • Fixed width font not working in compose window

Download: Thunderbird 78.1.1 for Windows (EN/US) | 64-bit | ~35.0 MB (Open Source)
Download: Thunderbird 78.1.1 for Linux (EN/US) | 55.5 MB
Download: Thunderbird 78.1.1 for Mac OS (EN/US) | 66.4 MB
Download: Thunderbird 78.1.1 in other languages
View: Thunderbird Website | Release Notes | Screenshot

Get alerted to all of our Software updates on Twitter at @NeowinSoftware