MLMs can achieve this, imperfectly, and are overkill. But they're not magic, they just screw with the headers so downstream can't detect the envelope or body changes.
Have you tried to use the pipe syntax of aliases, eg don@linuxmafia.org: | /usr/sbin/DKIMstripper-sendmail.sh donmarti@whereever.com // I just made this up, don't shoot me to forward via a munging script that: - removes any header containing DKIM (including some non-standard workalikes such as X-Google-DKIM-Signature) - possibly remove other provenance headers (eg I'm suspicious of X-Gm-Message-State) that could allow a downstream who is also upstream to wonder where their headers went - forwards whats left on to sendmail
HTH
glen
On 8/12/2017 9:03 AM, Rick Moen wrote:
Quoting Michael Paoli (Michael.Paoli@cal.berkeley.edu):
" ... but that may possibly cause other breakage ... e.g. DKIM, etc.?
To my knowledge, the only means for redirecting mail intersystem that has a prayer of not triggering the more aggressive antiforgery tecchnologies (DKIM, DMARC) is MLMs.
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