[Mailman-Users] Message-id?

[George Dinwiddie]

Hmmm...  Trashing mail without a Message-Id: header is my most effective
spam filter.

 - George

> Christopher P. Lindsey said:
> 
> > When people subscribe, using the web, and mailman sendt the mail with
> > the secret to prove your identity, it sends it without any Message-Id
> > line. I process mails using SMTP to my local qmail installation (so
> > SMTP to localhost) and qmail does not add any Message-Id either.
> 
> If qmail doesn't add a Message-Id: header it's not reasonable to expect
> Mailman to insert one either.  However, RFC 822 specifically states that
> a Message-Id: header is *optional*, so Mailman isn't violating anything
> by not adding one.
> 
> > The result is, that the mail is delivered to the target users mailhost
> > without any Message-Id line at all, and some mailsystem is configured
> > to performs header check and will reject such mails.
> 
> The systems that reject emails without Message-Id: headers are non-RFC
> compliant and should be flogged.  Sending 10MB attachments with the 
> envelope sender set to postmaster at broken.example.com without a Message-Id:
> is the only appropriate course of action...  (no, I'm only kidding about
> this last sentence).
> 
> Chris


-- 
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  George Dinwiddie                             gdinwiddie at alberg30.org
  The gods do not deduct from man's allotted span those hours spent in
  sailing.                                    http://www.Alberg30.org/
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