Web Directory by Internet-Web-Directory.com

Server-based challenge/response system that works with all POP3 accounts.

A web-based e-mail provider filtering spam and only allowing messages from trusted senders.

Open source automatic mail classification tool using Bayesian statistical methods. Offers details about installation and configuration procedures for the windows client.

E-mail filtering services. Provides spam filtering, anti-virus protection, attachment blocking, policy filtering, store and forwarding service, as well as detailed reporting.

POP3 service that blocks spam using sender verification methods.

Spam reporting service.

Content based spam filtering software.

Provides disposable e-mail addresses. Users can also set up rule sets for trusted or permitted senders.

Provides free, anonymous, temporary e-mail forwarding addresses. These addresses can be created on the fly. You decide how long the address lasts.

Anti-spam software utilizing a combination of filters and a human only authentication system.