Claws Mail includes all of the features you'd expect, including, but not limited to:
- Multiple accounts
- Threaded display
- Filtering
- Mime attachments
- Usenet news reading and posting
- SSL over POP3, SMTP, IMAP4rev1 and NNTP protocols
- GnuPG support (with GPGME)
- User-defined headers
- Colour labels
- UNIX mailspool support
|
- Multiple MH folder support
- Mbox import/export
- External editor
- Message queueing and drafting
- Automated mail checking
- Line-wrapping
- Clickable URIs
- Addressbook
- Printing
|
Claws Mail also includes a lot of useful and powerful features, only some of which are listed below:
- Plugin mechanism (see below)
- Actions
- Templates
- Built-in image viewer
- Face and X-Face headers support
- Reply-finder
- Fast message cache system
- Per-folder processing mechanism
- Spell checking (with enchant)
- Drag'n'drop support
- POP before SMTP authentication
- Automatic saving of message when composing
- Handling of Unix signals
- Control by command-line
- Built-in GDB crash handler (just in case ;-)
- Customisable toolbars
- Powerful Quick Search function
- 'Dynamic' signatures
- Font configuration
- Themes mechanism (see available themes)
- Automatic account selection
- Message scoring
- Ability to hide read messages
- IMAP over SSH Tunnel
- IMAP: CAPABILITY support.
- Return-Receipt handling
- Message priority setting
- 'Ignore thread' option
- Anti-phishing URL check
- Configurable notification of new mail
- 7bit and 8bit encoding of attachments
- NNTP: auto-mark cross-posted messages
|
- Configurable (non-)display of images
- Full coloration of messages
- User-definable quotation characters
- Watch marked threads
- Log window
- Reply to part of an email
- Replied and forwarded flags
- Man page and documentation
- Full GnuPG support
- 'On-the-fly' changing of the type of GnuPG encryption
and/or signing used (MIME/ascii) in the Compose window
- Manual selection of MIME type and encoding
for attachments
- Save all attachments in a mail at once
- Save 2 or more selected files to a single file
- SSL certificate management
- User-definable newsgroup names abbreviation length
- Address book: import from LDIF, Mutt or Pine natively
- Address book: import from other mailers via scripts
- Auto-completion of recipients (also via LDAP)
- Harvest addresses for addressbook
- Addressbook export to various formats
- Per-folder properties:
- Return-receipt
- Save messages
- Default To:
- Subject simplification
- Folder CHMOD
- Default account
- Folder colour
- Offline synchronisation
- Default dictionary
|
See the
Plugins page for a full list of plugins.
Latest Release: 4.3.1 (News), on 24 February 2025 
