0Spam.com Express 

The most powerful, next generation anti spam software, 0Spam.com Express is compatible with all versions of Windows and most E-mail clients, safely removes spam from your existing POP3, Yahoo, Hotmail, GMail, or IMAP accounts, and many cool features.
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POP3 Cleaner PRO 

A powerful manual/automatic mailbox cleaning utility with anti-spam capabilities for Windows. You can preview and delete unwanted e-mail messages directly from the mail server and retrieve the rest with your e-mail client (e.g. MS Outlook).
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KnockKnock 

Anti Spam program eliminates unsolicited e-mails in your inbox. KnockKnock is a complete e-mail enhancement program and spam solution, and works with your current Email client. Easy features handles, multiple e-mail accounts on multiple servers.
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AXIGEN Mail Server 

AXIGEN is fast, reliable and secure mail server on Linux, offering (E)SMTP, POP3, IMAP4 and WEBmail services, with centalised Web/CLI Admin and FREE support included, enabling the System Administrator to have full control of the email traffic.
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ANT 4 MailChecking 

E-mail checker that lets you know when you have new emails. You can preview headers and messges or delete spam mails directly from the server. It's very easy to set up and use. It even comes with an option to shutdown your PC by email.
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NetMail 

NetMail can store information on many e-mail accounts. If you have several external mailboxes at different ISPs you will not need to enter a new password and adjust the settings every time.
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