In the past couple of days, I'm seeing an uptick in rejects from Gmail
as follows:
<[elided]@gmail.com>: host
gmail-smtp-in.l.google.com[2607:f8b0:4004:c17::1a] said: 550-5.7.1
[2610:1c1:1:606c::19:2] Our system has detected that this message
is
550-5.7.1 not RFC 5322 compliant. To reduce the amount of spam sent
to
Gmail, 550-5.7.1 this message has been blocked. Please review 550
5.7.1
RFC 5322 specifications for more information.
bp41-20020a05620a45a900b006a64dbdb75asi7765031qkb.308 - gsmtp (in
reply to
end of DATA command)
As far as I can tell, the message is compliant. It doesn't have any of
the obvious problems, at least. From, To, Message-ID and Date are
supplied. No duplicate headers.
These are text/plain messages: commit mail from an svn repository.
I like to think I have a reasonably robust understanding of RFC 5322.
I'm sure I must be missing something very subtle.
Has anyone else seen (more of) these?
Thanks.
Philip
--
Philip Paeps
Senior Reality Engineer
Alternative Enterprises
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