Software · Internet & communication
Claws-Mail
Claws Mail is an email client (and news reader), based on GTK+.
- Completely free
- Windows and Linux
- Open source
Overview
Claws-Mail is an email client, available on Windows and Linux. Other documented uses: RSS reading.
Features described in its Winget manifest: central authentication (LDAP, SSO…) and multiple accounts.
Services and protocols mentioned: IMAP and SMTP.
Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.
Excerpts that establish this information
- “Claws Mail is an email client (and news reader), based on GTK+” — Flathub, 10 November 2026
- “Claws Mail is an email client (and news reader), based on GTK+” — Flathub, 10 November 2026
- “Supports POP3, APOP, IMAP, SMTP, SMTP AUTH, NNTP, LDAP, multiple accounts, spell-checking, addressbook, SSL, GPG, filtering, i18n, & more.” — Winget, 10 November 2026
- “Supports POP3, APOP, IMAP, SMTP, SMTP AUTH, NNTP, LDAP, multiple accounts, spell-checking, addressbook, SSL, GPG, filtering, i18n, & more.” — Winget, 10 November 2026
At a glance
All of Claws-Mail is free: no feature is locked behind a paid plan, and its code is open.
Its licence (GPL-3.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.
Strengths
- Open source code
- Commercial use allowed
About
Claws Mail is an email client (and news reader), based on GTK+, featuring: 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. This is an unofficial package. (See package metadata for details.)
Description from Flathub — AppStream (Flathub)
Sources and checks
- Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
- Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
- Facts collected from Winget (Windows Package Manager) (publisher, platforms, version) —
- Last technical check: 7 November 2026
- Description from Flathub — AppStream (Flathub)
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