It is in active development, can be extended by many plugins, and allows importing of mbox-format mailboxes (coming from Thunderbird, for example). Its native mailbox format is wikipedia:MH Message Handling System, although the mbox format can be used with a plugin. Claws Mail cannot write HTML messages (in keeping with the Keep It Simple principle), but can read them using plugins.
For Gentoo Linux it is provided by the mail-client/claws-mail package for all architectures except ia64.
Plugins are compiled with Claws Mail when the appropriate USE flags are set —
Before version 3.9.1 plugins had to be separately emerged.
- Simple way: Bogofilter is a powerful Bayesian filter which doesn't need to be configured. It quickly learns from the user's spam and ham classifications in Claws Mail. It is the preferred spam filter for desktop computers. Set the
bogofilterUSE flag to compile the plugin with Claws Mail.
- Hard way: Spamassassin is a huge mail filtering system, using Bayesian filtering and external spam-definition resources. It must be extensively configured and its daemon (spamd) must be running for Claws Mail to use it. It is the preferred spam filter for mail servers. Set the
spamassassinUSE flag to compile the plugin with Claws Mail. Some information can be found in the articles Complete Virtual Mail Server and Mailfiltering Gateway.
Create a /etc/portage/package.use/claws-mail file to activate the desired USE flags (or add them to the /etc/portage/package.use file). To set
archive, for example:
echo 'mail-client/claws-mail bogofilter pgp archive' > /etc/portage/package.use/claws-mail
Then emerge Claws Mail:
emerge --ask mail-client/claws-mail
- Accounts, mail filtering, models, actions, labels, etc. are set in the Configuration menu;
- main configuration is done in Configuration > Preferences…;
- plugins are (de)activated in Configuration > Plugins… and configured in Configuration > Preferences…;
- the archive plugin is run from Tools > Create Archive…;
- the user interface can be modified: lists headers in global or message views, icons, fonts;
- the address book can import and export several formats.
mail-client/clawsker can be installed to edit many preferences which are not in the GUI:
emerge --ask mail-client/clawsker
Then launch it when Claws Mail is not running:
The Claws Mail preferences file is ~/.claws-mail/clawsrc.
Many icon themes can be installed with x11-themes/claws-mail-themes:
emerge --ask x11-themes/claws-mail-themes