Features:

  • Quick response
  • Graceful, and sophisticated interface
  • Easy configuration, intuitive operation
  • Abundant features
  • Extensibility
  • Robustness and stability

The appearance and interface are designed to be familiar to new users coming from other popular email clients, as well as experienced users. Almost all commands are accessible with the keyboard. The messages are managed in the standard MH format, which features fast access and data security. You'll be able to import your emails from almost any other email client, and export them just as easily.

Lots of extra functionality, like an RSS aggregator, calendar, or laptop LED handling, are provided by extra plugins.

What's New:

  • SSLv3 server connections are now disabled by default, in response to the POODLE vulnerability, see https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3566.
  • Several PGP/Core plugin improvements
    • Indicate when a key has been revoked or has expired when displaying signature status. For example,
      • "Good signature from %s, but the key has expired."
      • "Good signature from %s, but the key has been revoked."
    • When displaying the full information, show the Validity, and the
    • Owner Trust level. Also indicate expired and revoked keys, and revoked UIDs.
    • The "Content-Disposition: attachment" flag in PGP/MIME signed messages has been removed. It was confusing for cetain MUAs.
  • A new version of the RSSyl plugin, completely redesigned and rewritten. Migration from the previous version is automatic, it has a new storage format in ~/.claws-mail/RSSyl/ (hierarchical directories instead of flat file format). It uses the expat library instead of libxml2 for parsing feed data.
  • The results of TAB address completion in the Compose window have improved ordering. Order of results:
    • Match beginning of name
    • Match beginning of additional names
    • Match complete email address before @
    • Match beginning of email address
    • Compare relative position of match
    • Compare name alphabetically
    • Compare address alphabetically.
  • Due to popular demand, use of the Up key in the message body in the Compose window stops at the top of the message body and does not continue up to the header fields. This reverts the behaviour introduced in version 3.10.0.
  • In the Compose window, when navigating with the arrow keys, selecting, and thus modifying, the Account selector is now prevented.
  • In the Compose window, a mnemonic (s) has been added to the Subject line.
  • The Queue folder is highlighted if there are messages in its sub-folders and the tree is collapsed.
  • When sorting messages by 'thread date', clicking the 'Date' column header will now toggle between ascending/descending and will not switch to 'date' sorting.
  • A new QuickSearch filter has been added that searches a header's content only. H S : messages which contain S in the value of any header.
  • A Reply-To field has been added to the main Template configuration.
  • The menubar can now be hidden, default hotkey: F12.
  • Fancy plugin: A user-controlled stylesheet can now be used.
  • Python plugin: Add flag attributes to MessageInfo object.
  • Python plugin: Make 'account' property of ComposeWindow read/write.
  • Libravatar plugin: a network timeout option has been added.
  • appdata has been added for package managers, it must be specifically enabled, using ./configure --enable-appdata See http://people.freedesktop.org/~hughsient/appdata/ for further information.
  • The tbird2claws.py script, for converting a Thunderbird mailbox to a Claws Mail mailbox, now handles sub-directory recursion.
  • Updated translations: Brazilian Portuguese, Bulgarian, Dutch, Esperanto, Finnish, German, Hebrew, Lithuanian, Slovak, Spanish, and Swedish