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...he sieve code showed, I am testing for where reply-to claims to be for internal domain, but the from is NOT from it. This email was a good example of that. -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://dovecot.org/pipermail/dovecot/attachments/20190717/3a67bcbe/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 228 bytes Desc: OpenPGP digital signature URL: <https://dovecot.org/pipermail/dovecot/attachments/20190717/3a67bcbe/attachment.sig>

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