eMail Rescue - Block spam messages from your inbox with black and white lists.

EMailerID - Get caller ID for your e-mail.

Emailer-ID - Screen your e-mails before they are downloaded to your computer.

EMP - Enterprise Anti-Spam Filter - Stop spam and viruses before they enter your mail server with this server-based antispam filter.

FastMail - Filter, process, and record incoming correspondence and requests.

Filter Breeze by CleanMyMailbox - Check your e-mail newsletter for words used in spam filters.

GFI MailEssentials - Add antispam and management features to your mail server.

G-Lock SpamCombat - Remove spam emails just from the mail server without pulling them down into your inbox.

Herbivore Distributed Anti Spam Filter - Identify and screen spam mail.

iHateSpam - Stop spam by analyzing your e-mail and placing suspicious messages in a separate folder.