On Wed, Feb 05, 2025 at 02:01:27PM +0100, Geert Hendrickx via Postfix-users
wrote:
> It seems that such reduced Received header would not be RFC5321 compliant,
> as the "from <client name>" clause is mandatory according to section 4.4.
It is still a valid Received header, just like the ones added by
submission via sendmail(1). Example (current unmodified Postfix):
Received: by <hostname> (Postfix, from userid 1000)
id 2408492CB80; Wed, 22 Jan 2025 01:04:55 +1100 (AEDT)
See https://datatracker.ietf.org/doc/html/rfc5322#section-3.6.7
which covers non-SMTP cases by essentially saying any list
of syntactically valid pairs is fine. The submitted message
is presented as not arriving via SMTP, and so SMTP (RFC 5321)
rules don't apply.
--
Viktor.
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