Web Directory by Internet-Web-Directory.com

Virus scanning and spam prevention based on blacklists and user feedback.

Provides anti spam software with server based email and web security features, email and spam filtering software for Network Administrators.

"Spam Agent" software offers content based filters for spam filtering in both home and corporate environments.

Filters spam email from current e-mail address of user.

Provides advanced technologies and solutions to enhance the capabilities and manageability of e-mail.

Whitelist-based service that automatically "cleans" mailboxes of unwanted email multiple times per hour.

A free e-mail forwarding and spam filtration service.

Fully managed service which filters viruses, worms and malicious macros and spam.

Enterprise level email protection and message management services.

Free to individuals. Fights spam by putting a copyrighted haiku in the header that is only licenced (for a fee) to bulk mailers who respect codes of practice. This enables the identification of spam.