Embedded image spam losing its luster?

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We reported last month in the Commtouch Q1 2007 Spam Trends Report that a new kind of spam had appeared that links to a hosted image rather that embedding it in the message itself. In the samples reported on spammers fraudulently hijacked legimate email newsletters and implanted a reference to a spam image at the beginning of the message.

Yesterday, Secure Coputing Corp. reported that new hosted image spam has the “potential to significantly grow spam volumes.”
One the one hand, hosting the images on innocent-looking URLs is a definite advantage in circumventing filters that work by blocking suspicious URLs or image attachements. On the other hand, these campaigns are more effort for the spammers, since they require hacking innocent websites to host their spam images.

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