NoSpamToday is a SMTP/POP3 mail spam filter that is compatible with all email server software. It has SpamAssassin, attachment blocker, and RBL filter, and can work with virus scanners. It is comprehensive and effective.

One of the most significant benefits of NoSpamToday is its traffic limiting feature. This feature protects your mail server from flooding or directory harvest attacks. Additionally, recipient addresses can be checked while a message is submitted, eliminating the backscatter problem caused by some mail servers trying to send non-delivery notifications to forged sender addresses.
NoSpamToday provides online access to view statistics charts and reports in real-time through a web browser or using the NoSpamToday admin application. Online data available includes spam statistics, mail logs (a listing of received mails, including subject, sender, and recipient addresses), and a ranking of spam hosts (hosts that submit spam mails in the last 24 hours). Furthermore, the user interface is user-friendly, allowing for easy and fool-proof configuration. Any configuration changes made are validated before they are accepted, and the user is warned before making any configuration errors.
NoSpamToday is available for personal and non-commercial use for free. Commercial licenses are offered at low prices, with the purchase of a license including maintenance and updates for 12 months. Renewal licenses are available at a discount. Additionally, special discounts for communities or non-profit organizations are available upon inquiry. In summary, NoSpamToday is a comprehensive spam filtering solution that ensures safe and efficient mail server management.
Version 3.2.3.1: Directory Harvest Protection (offending remote hosts are automatically blacklisted for twenty minutes), Improved UI appearance, Workarounds for Windows Vista/Server 2008 annoyances, Minor improvements and fixes; Manual updated