Clyton is an email client with advanced security and spam filtering features. The spam filter is highly configurable and supports DNS blacklist checking (DNSBL).

Expect 85% of spam to be eliminated with the default configuration. Email that is suspicious but not obviously spam can be quarantined for 24 hours and then retested. The built-in address book supports personalized mass-mailings.

Received email cannot run scripts, download multimedia, or use embedded objects without the user's approval. Other features include encrypted storage, whitelisting, powerful HTML editor, attachment viewer, message drag and drop, custom message templates, SSL encryption, and much more.