NoSpamToday! for Servers - Delay Filter

Delay Filter Concept

The concept of a delay filter was born out of the observation that most spammers and bulk mailers are an impatient lot, they do not wait for even a short period of time to see if a message will be accepted by a mail server at all.

So the delay filter is a very simple filter: the mail transaction is frozen for a short time period, while further processing (which may be rather costly both in terms of memory and CPU usage) is delayed. If the mail client disconnects during this time period, the message is simply discarded. Even short delays of 20 to 30 seconds are usually sufficient to get rid of about a third of all spam messages.

Learn More ...

• Read more about NoSpamToday!'s Delay Filter.
• Read more about NoSpamToday!'s Mail Flooding Protection and Traffic Limiting.
• Read more about NoSpamToday!'s Open Relay Protection.
• Read more about NoSpamToday!'s Core Features and Benefits.