Claws Mail

Windows · Mac · Linux

Freedom report

Three barsScore 6.0

Claws Mail is ranked #73 of 143 in email clients on Freedom251. It runs on Linux, macOS, Windows. There is a free plan.

Claws Mail plans and pricing

Claws Mail Free Free Email client and news reader · GPL-licensed claws-mail.org · 11 Oct 2026

Product: Claws Mail is an email client and news reader based on GTK+.
Mail storage: Messages are managed in the standard MH format, which the site describes as offering fast access and data security.
Email features: Features include multiple accounts, threaded display, filtering, MIME attachments, address book, printing, and search.
Protocols: The features page lists SSL support for POP3, SMTP, IMAP4rev1, and NNTP.
Encryption: The features page lists GnuPG support with GPGME and describes full GnuPG support, including signing and encryption options.
Plugins: Extra plugins provide functionality such as RSS aggregation, a calendar, and laptop LED handling.
Integrations: The FAQ includes guidance for LDAP, Microsoft Exchange, Gmail, Tor, and OAuth2.
Windows support: The maker provides 32-bit and 64-bit Windows downloads and says most Claws Mail features are available in the Windows port.
HTML email limitation: The user manual states that Claws Mail does not let users write and send HTML emails.
Support: The project offers a users' support and discussion mailing list and an IRC channel for help and feedback.
Release: The site identifies version 4.4.0, released on 09 March 2026, as the latest release.
History: The user manual says Claws Mail has existed since April 2001, initially under the name Sylpheed-Claws.
Price from: Free

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