New Antispam Defenses in MPP
I usually don’t write about my own product, MPP, in this blog, but I am very excited about some of our new features. Our goal is to build as much spam detection capabilities as possible into smtp protocol level analysis and to defer as little email as possible to content scanning engines. With this in mind, we have introduced a few new features in MPP that help towards this goal.
One features is ‘thresholds’, which allows providers to define characteristics of email streams in terms of message rate/time period and spam rate/message volume. Senders that either send too much mail or too much spam will be automatically blocked at the smtp level for a specified period of time. This is very helpful to stop drone attacks, but is also a great tool to stop outbound spam. Since both clean and spam mail can be measured this is a very useful tool to find abusive senders.
The other feature of interest is spam-traps. With this feature admins can set-up address templates using regular expressions. Hosts that send to these addresses will be blocked at the SMTP level from sending. This is a great tool to stop dictionary attacks and in large settngs can be quite an effective and simple tool.
Technorati Tags: antispam, spam, outbound spam, email, email security