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[IKEDA Soji <address@concealed>]

Hi Victoriano,

2021/01/22 20:41、Victoriano Giralt <address@concealed>のメール:

Hi,

We are having trouble with one of our lists, that is marking as bad
messages that arrive without the Message-Id header. It complains in the
logs[1] and saves the message in "bad".

The mail filtering antivirus, Kaspersky in our case, lets them pass in.
I know that Amavis does not.

My first reaction was to tell the anti-virus administrators to get it
to refuse messages without Message-Id, but, after a careful read of
RFC5322 section 3.6.4[2], it is a SHOULD, not a MUST, so, in purity,
those messages are not totally out of RFC compliance ...

Is there a way to tell Sympa to be nicer with this borderline RFC
offenders? We do not want to start a useless fight with the sending
party, with the usual "but our messages get delivered to other
universities..." type of conversation.

What MTA are you using?  For example with Postfix, you could set always_add_missing_headers (and maybe related parameters like local_header_rewrite_clients). Please see postconf(5) manual page [1] for details.

Though I have not investigated about the other MTAs, they may have similar feature.

[1] http://www.postfix.org/postconf.5.html

Regards,

— Soji

Thanks. I wish that this message finds all the Sympa community in as
good shape as possible in this complicated times we are living.

[1] Log file excerpt:
2021-01-22T10:23:30.926756+01:00 sympa sympa_msg[334]: err main::#243 >
Sympa::Spindle::spin#83 > Sympa::Spindle::ProcessIncoming::_twist#111
Message Sympa::Message <address@concealed> has no message ID

[2] https://tools.ietf.org/html/rfc5322#section-3.6.4

--
Victoriano Giralt                             Innovation Director
Digital Transformation Vicerectorate          University of Malaga
+34952131415                                  SPAIN
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A: Yes.

Q: Are you sure ?

A: Because it reverses the logical flow of conversation.

Q: Why is top posting annoying in email ?