http://bugzilla.spamassassin.org/show_bug.cgi?id=3021





------- Additional Comments From [EMAIL PROTECTED]  2004-02-22 12:42 -------
Subject: Re:  Use whitelist_from_rcvd failure as forgery rule

(replying by mail with Cc because bugzilla seems to be down at the moment)

I don't have corpus results and can't get them easily until my primary
computer gets back from repair.

Daniel, you mention auto-whitelist in mass-check, but this is for
whitelist-from and def-whitelist-from, not auto-whitelist.

A corpus test could only find the def-whitelist-from cases, since there
would not be a reasonable whitelist-from list. That's ok, because I think
of this rule as being most relevant to catching forgeries of addresses
that are popular enough to make it on to the def-whitelist-from list.

Something else to keep in mind for testing is that this rule comes almost
for free when we have a def-whitelist-from and all it does is add hit
points to any case where someone tries to forge an address that is on the
def-whitelist-from.

Spammers are much less likely to forge addresses on your personal
whitelist-from list, although if they happen to this will catch it, again,
almost for free.

You can get some idea of how many examples of this are in a corpus by
searching for messages in the spam corpus that are from an address in the
def-whitelist. But due to the seriousness of the forged paypal and amazon
scam attempts, for example, I think a rule that hits them may be more
useful than the absolute numbers of such messages would indicate.








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