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_unlck
2019 Jul 16
3
pigeonhole question: filtering on delivered-to in case of fetchmail
So, one of the problems I am seeing is that people are trying to fake
users into revealing information by sending from an outside domain but
with an internal reply to address and claiming to be administration, IT
or what not.
I can set up something that will reject if from is outside the domain by
reply to is internal. The problem is in some setups, there are fetchmail
setups. I do not want to