Tray Helper 

If your Windows is overloaded by many applications, try Tray Helper. There is a built in event reminder and e-mail checker. You can define mail filters, there is also a pop-up killer. You can download and install plugins and upgrade Tray Helper.
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POP3 Sweeper 

Delete unwanted email messages directly from your POP3 server email account mailbox. Anti spam, spam filter.
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VanMail 

VanMail is a powerful POP3/SMTP email client that allows you to manage your email with ease. With VanMail's powerful built-in SPAM protection, you control the emails you want to receive. VanMail even comes with an advanced challenge-response system.
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Anti-Spam Filter 

Anti-Spam Filter is an innovative self-learning system, offering you spam protection without deleting the important correspondence. Anti-Spam Filter maintains its own collaborative spam-tracking database, which uses the signatures of spam messages.
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Outlook Spam Filter 

Outlook Spam Filter is an easy-to-use MS Outlook add-on that protects your Inbox against spam. Bayesian filtering technology. Auto-learning Ability. Quarantined e-mails are stored in a separate SPAM folder. POP3, IMAP, HTTP and MS Exchange support.
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DrStopSpam 

Stop Spam by putting them out of business! New Easy Cake Mode! . Without any knowledge of how to track down the source of the spam you receive, you can now send professionally written complaints to those able to stop spam at its source.
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