CYBERSitter Anti-Spam - 4.10 

An Anti-Spam program that allows you to selectively choose the mail you receive through keyword, domain name, non-existent domain name, and numbered domain name filters. A very thorough anti-spam that helps to prevent you from receiving mass mail and "junk" e-mail.

Deadletter - 1.12 

Deadletter is an anti-spammer for Eudora Pro and Light(version 3.05 or higher). You can use its presets, which work quite well, or add your own favorite spams to the list. You can easily block any address,domain, subject, or text from being deposited in your Inbox, sending it instead to the "Deadletter" box.

E-Mail Remover - 2.4 

A useful program that allows you to view and delete your e-mail right off of the server by showing you the header. This way you do not have to waste all of your time downloading useless messages.

MailShield - 1.5 

A filtering tool that can block mail relaying, filter out junk mail, and stop e-mail bombs on your mail server. Uses an easy text-based program to filter all the e-mail that a mail server receives.

SpamEater Pro - 2.6.7 

SpamEater Pro will remove spam from your mailbox and notify you (wav, popup message, or launch your mail software) when there is new mail waiting! SpamEater Pro will connect with your ISP's mail server (via POP3) and check each e-mail message found there - prior to your downloading with your e-mail client program. It compares the information in the message with your valid e-mail addresses and against an extensive listing of known spammers. If the message is found not to be to one of your valid addresses (which you define), or if a match is found against the list of known spammers, then the message is deleted from the mail server.

SpamKiller - 2.55 

SpamKiller is very powerful, yet easy to use. Five different filter types let you filter on any message part, including the message text, headers and country codes. The Friends list ensures that all normal e-mail reaches you,and copies are made of all automatically filtered mail. The Filter Wizard makes it easy to add your own filters, and registered users receive online updates. Both automatic and manual complaints are supported, and you can write your own messages. SpamKiller handles any number of POP3 or MAPI accounts.