anti spam filter (2 products)

PostGuard Spam Filter 3.5 (Commercial, $3.00)

Sentinare, purely mail. Email is a form of personal, private communication. Secure encrypted spam and virus free email for your home or business. 99% accurate filtering solution with the lowest false positives, includes 1GB of email storage that will never be subjected to email marketing or advertisements. Support for IMAP, POP, SMTP, SSL, Webmail, and web based spam quarantine puts the power of email in your hands. Sentinare is here to restore order and integrity to your inbox. Your privacy, our priority.

xTerminator 4.21 (Freeware)

Anti-spam tool: xTerminator 4.1 will help you block spam and most of worms before they even reach your mailbox. You'll be able to delete unwanted messages directly from the server thus saving valuable time and bandwidth. With xTerminator you can check e-mail while it's still on server, automatically filter unwanted messages, manually check messages before deletion (optionally), save bandwidth, lessen the chance of virus infection, Clean multiple accounts, create custom filters, block all but friendly messages (optional), auto-reply with pre-defined message. Built-in Challenge/Response System allows you to send people a question (like, what's my pets name?) that, if correctly answered, will provide them with a password so their messages will not be deleted again or even automaticall added to your "Friendly Content" list. xTerminator also has a built-in Word List Builder, a simple utility that will help you extract words usually used by spammers within subject line of their messages.