Download Mozilla Thunderbird 102.4.2

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The Mozilla Foundation has released version 102.4.2 of Thunderbird. Thunderbird is an open source email and newsgroup client, with features such as support for multiple mail and news accounts, a spam filter, spell checker, and a customizable appearance. In version 102 Mozilla has refreshed the user interface and the address book, made importing and exporting user accounts easier and added the Matrix chat protocol. The following improvements have also been made in this update:


  • “Address Book” button in Account Central will now create a CardDAV address book instead of a local address book


  • Messages fetched from POP server in Fetch headers only mode disappeared when moved to different folder by filter action
  • Thunderbird re-downloaded locally deleted messages from a POP server when “Leave messages on server” and “Until I delete them” were enabled
  • Multiple password prompts for the same POP account could be displayed
  • IMAP authentication failed on next startup if ImapMail folder was deleted by user
  • Retrieving passwords for authenticated NNTP accounts could fail due to obsolete preferences in a users profile on every startup
  • Get Next n Messages did not consistently fetch all messages requested from NNTP server
  • Get Messages button unable to fetch messages from NNTP server if root folder not selected
  • Thunderbird text branding did not always match locale or localized build
  • Thunderbird installer and Thunderbird updater created Windows shortcuts with different names
  • LDAP search filters unable to work with non-ASCII characters
  • “Today” highlighting in Calendar Month view did not update after date change at midnight

Version number 102.4.2
Release status Final
Operating systems Windows 7, Linux, macOS, Windows 8, Windows 10, Windows 11
Website Mozilla Foundation
License type Prerequisites (GNU/BSD/etc.)
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