In the past, we have discussed in much detail the ways in which email is examined for spam and phishing properties. Some of these emails and properties are contained in the things you might send out to your targets...

The AllSpammedUp blog recently did another good post on what's typically in these technologies to stop potential bad email from being received. It also explains that typically a combining effort of anti-spam technologies might be in order for some organization trying to protect it's users. It also shows how some of the older ways of stopping spam via content filters can cause issue.

To be honest, I would have loved to see this article address more detail towards the latest behavioral filtering technologies more commonly used today like Sender Score from Return Path.

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Anti-Spam Products Are More Than the Sum of Their Parts

When you boil the spam problem down it becomes quite simple - someone is sending you emails that you don’t want to receive.  This makes the anti-spam solution a simple one too - stop unwanted emails from arriving in someone’s email account.  However, actually achieving this is a very complex task.

Any anti-spam system that is worth using will contain a range of preventative measures and features that are used to determine whether an email is likely to be spam or not.  As a complete solution they can be very effective, but taken individually and their weaknesses become more apparent.  Here are some examples...

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http://www.allspammedup.com/2009/04/anti-spam-products-are-more-than-the-sum-of-their-parts/

-Dennis

Eloqua

Don't Just Send, Deliver!