Collaborative spam filtering network allowing users to report and filter out matching spam.

Checks your existing POP3 email account every ten minutes and filters spam and viruses. A 30 day free trial is offered.

Spam filtering service to block spam and viruses by domain.

Australian POP3 email spam filtering service requiring no software.

Fully-managed antispam solution and antivirus service.

An email filtering service for businesses or individual domains. 30 day trial offered.

Proxy software for incoming mail.

Swedish company filters individual POP3 and IMAP accounts as well as entire domains. No software installations required. Offers a 30-day trial.

Offers spam protection that doesn't require any installation. Based on a challenge-response system. Free service.

Fuzzy-logic software based anti-spam filter for Windows systems.