The mailing list for listmasters using Sympa

[IKEDA Soji <address@concealed>]

On 22 Jan 2021 20:18:17 -0500
"John Levine" <address@concealed> wrote:

> In article <address@concealed> you 
> write:
> >-=-=-=-=-=-
> >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".
> 
> Any mail system that doesn't put message-id on its outgoing mail is
> badly broken. Most mail I see without message-id is from spambots. I
> realize that in 5322 it is a SHOULD, but SHOULD means "MUST unless you
> have a really good reason to do something else" which they don't.
> 
> Any chance you can tell us who it is or what kind of software they are 
> using?
> 
> The hacks other people suggested to add a message-id on the way in
> will work, but the senders should really fix their mail software.

In the RFC 822 era, the Message-ID was optional field.  RFC 2822
specified that messages SHOULD have this field.

It is unlikely that many applications from the last century still
survive, but it is possible that certain network equipments have
not yet been updated, and it is difficult to fix them.

I think The function to complement Message-ID field is intended
to be used with MTAs in front of such devices so that their output
will be "fixed".


Regards,
-- Soji


> R's,
> John
> 


-- 
株式会社 コンバージョン
ITソリューション部 システムソリューション1グループ 池田荘児
e-mail address@concealed
https://www.conversion.co.jp/