Author: Robert Wysocki Date: To: exim-users Subject: [exim] DKIM verification and envelope-from
I'm trying to achieve configuration that would verify DKIM signatures
for known signers.
Everything works fine until envelope-from address is one of known
signers. But many spams have envelope-from set differently than From:
header, eg. injectingy472@??? in envelope-from and
something@??? in From: header.
This enables them to bypass DKIM signature checks and therefor to bypass
one of the anti-spam mechanisms.
How can I instruct exim to include From: headers' content in known