Claws Mail

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Claws Mail
Main window of Claws Mail 2.7.1
Main window of Claws Mail 2.7.1
Developer(s) Holger Berndt, Andrej Kacian, et. al.[1]
Initial release 0.4.67claws1 (May 11, 2001; 16 years ago (2001-05-11))
Stable release 3.15.0 (March 26, 2017; 2 months ago (2017-03-26)) [±]
Preview release None [±]
Written in C (with GTK+)
Operating system BSD, Linux, Mac OS, Solaris, Unix, Windows
Available in Brazilian Portuguese, Bulgarian, Catalan, Simplified Chinese, Traditional Chinese, Croatian, Czech, Dutch, English, Esperanto, Finnish, French, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Russian, Serbian, Slovak, Spanish, Swedish
Type E-mail client, news client
License GNU GPLv3

Claws Mail is a free and open-source, GTK+-based email and news client. It offers easy configuration and an abundance of features. It stores mail in the MH mailbox format and also the Mbox mailbox format via a plugin. Claws Mail runs on both Windows and Unix-like systems such as Linux, BSD, Solaris.


Formerly known as Sylpheed-Claws, it started in April 2001 as the development version of Sylpheed, where new features could be tested and debugged, but evolved enough to now be a completely separate program. It forked completely from Sylpheed in August 2005.


Claws Mail provides many features,[2] among them are:

  • Search and filtering
  • Security (GPG, SSL, anti-phishing)
  • Import/export from standard formats
  • External editor
  • Templates
  • Foldable quotes
  • Per-folder preferences
  • Face, X-Face support
  • Customisable toolbars
  • Themes support
  • Plugins


Claws Mail's features can be extended with plugins,[3] such as

See also[edit]


  1. ^ The Claws Mail Team
  2. ^ Features pages on
  3. ^ Plugins page on

External links[edit]