On Sat, 24 Jul 2010, Jason Haar wrote:

It made me think: it contains links to the site it wants you to go to (which are all the same) - but includes a fake unsubscribe option that refers to the same URL. I've seen this behavior in a tonne of spam...

How much work would it be to create a rule that detects "unsubscribe" links, and scores it up if it has the same URL as seen elsewhere in the body? Real messages wouldn't do that...?

Short of a plugin it would be very difficult. Regular rules don't have any way to refer to the matches of other rules, you'd have to write a rawbody rule that matched all of the message from the embedded target URL to the matching embedded "unsubscribe" URL. That would likely kill performance.

--
 John Hardin KA7OHZ                    http://www.impsec.org/~jhardin/
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