Why is my spam in colour?

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Why is my spam in colour?

Today one out of four emails on the internet is an image spam message. This is not because spammers have just realised the marketing benefits of captive colours. Instead, this is because the spammers have identified a weakness in many anti-spam systems and are moving diligently to maximise this opportunity by fully exploiting this weakness.

Two of the ways of getting by a defense system are to overwhelm it and to evade it. For years spammers have used a combination of these approaches to get past anti-spam systems. Recently, we've talked about how spam volumes were overwhelming email networks. Now we will explore the spammers’...

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