Free antispam service for pop, Yahoo, and Hotmail accounts supporting multiple languages.

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.

Filtering solutions for Novell GroupWise and Microsoft Exchange.

Anti-Spam SMTP Proxy implementing platform independent email filtering services.

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

Email filtering service.

Offers a "reply first" approach email solutions to protect your mailbox.

How to set up an effective spam filter with procmail.

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

Only allows mail from people you know. Spammers have to pay the users to send them spam.

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

Provides spam-proof email accounts. Only allows email from addresses in whitelist. Charges a fee for others to reach the customer's mailbox.

A free e-mail forwarding and spam filtration service.

System of clients and servers that collect and count checksums of email messages in order to detect and filter bulk UCE.

Allows you to monitor and filter e-mail traffic to protect your organization from spam and virus attacks.

Automates filter, mailbox, and nickname creation for Eudora Macintosh. Filters on more than 1,000 spam characteristics.

Consumer opt out registration form for the Direct Marketing Association.

Spam filtering service.

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

Protects your entire domain from Spam and Viruses. No software to install or maintain.

EMF Systems provides email filtering services from the United Kingdom for ISP's, Businesses and home users.

Checks your newsletter to see if it is spam. This service stops your opt-in newsletter from being labeled as spam.

Spam filter service designed to protect children from junk emails.

Enterprise level email protection and message management services.

Managed service provider that specializes in email security and control.

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.

Fight spam and block unwanted email with a safe address.

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

Web based email service to retrieve and spam filter pop, Hotmail and Yahoo! accounts.

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

Mail Zapper automatically checks and notifies you of spam e-mail before you download it.

Spam and virus defense for businesses and service providers.

Offers e-mail filtering to stop spam and viruses at their server before it reaches to the end user.

Spam filtering protection for your corporate e-mail network.

Managed mail service with parental controls, POP/IMAP and Webmail.

Offers protection against spam, combined with personalization and privacy for individual email users.

Remove viruses and spam mail before they reach your computer.

Runs as domino server task, NO template customizations, supports blacklists/whitelists, Spam email categorization, Electronic fingerprinting, Supports multiple Maps/RBL blacklists, Auto whitelist generation on outbound SMTP traffic.

Provides redundant Managed Email Fitering Services: protection against spam, virus and failure without changes to the existing installation.

Anti-Spam gateway which filters out spam and viruses for an entire domain. A 30-day free trial is offered.

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

Host based anti-spam and anti-virus filtering plus several other internet security services.

Open source collaborative spam filtering system using digests of messages to identify spams.

Email Spam filtering service for businesses. Mailboxes available.

Stops spam before it ever reaches your network.

Framework for publishing information through DNS describing a list of ip addresses allowed to send emails from a specific domain.

Spam filtering and email virus scanner service.

SimpleFilter is a tool to help you filter junk mail (spam).

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

Email management solution that provides full control over security and usage of corporate email systems.

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.

Spam Manager Professional is a windows based gateway filter for SMTP email servers. This filter uses DNSBL Servers to reject junk or spam mail coming from blacklisted servers.

A service that stops unwanted email by verifying senders addresses against a whitelist of friends.

Web based spam filtering service. Checks POP accounts every 10 minutes and removes spam based on filtering rules as well as personal white & black lists.

A mail filter, written in Perl, to identify spam using a wide range of heuristic tests on mail headers and body text. Free software. Can be used as a standalone mail filter, or from procmail.

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

Proxy software for incomming mail.

SpamFixer is an anti-spam filtering solution for small businesses as well as enterprise sized organizations.

Provides anti-spam solutions for home and corporate environments.

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

Australian POP3 email spam filtering service requiring no software.

Commercial filters for spam reduction.

Easy to use spam blocker. Stop spam before it reaches your computer.

Provides spam-free forwarding account filtered with ORDB and SpamCop service.

Spam blocker for Outlook and Outlook Express.

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

Provides filtered web-based e-mail accounts and web space.

A mailing list run by Network Advertising Initiative (NAI) about false positives in anti-spam software.