POP Peeper is an email notifier supporting POP3, IMAP, SMTP with SSL and Oauth2; WebMail and RSS are also available. Other features include portability, password protection, spam filter, spell checker and message search.
MailWasher Pro is a popular antispam program which lets you remove all spam and unwanted email before it gets to your computer. This saves you from downloading spam and other junk to your inbox, thus letting you view only the email you want.
CleanMail is a complete Anti-Spam / Anti-Virus solution (SMTP / POP3) that works with any mail server like Microsoft Exchange, Microsoft Small Business Server (SBS), Lotus Notes / Domino or IMail.
Clyton is an email client with advanced security and spam filtering features. Although priced for the general public, Clyton possesses the reliability and security required by businesses.
Antispam and antiphishing plug-in for The Bat! and Voyager. The plug-in filters POP3, IMAP accounts and deletes most of spam on the server by headers.
Office 365, Outlook, Live Mail, Outlook Express Bayesian spam filter. Allow / Block list. Bounce spam back to spammers. Report spammers. Email forwarding. Auto delete spam. Challenge emails. Stats. Convert the toolbar into your own language. Customize
MailBee.NET AntiSpam is a .NET component which allows applications to detect spam messages with self-learning and very efficient Bayesian filter.
SpamAssassin in a Box is a powerful and reliable spam filter for Windows. Beside the famous e-mail filter SpamAssassin, it also contains a Windows system service, making SpamAssassin controllable via the Windows Service Control Manager.