[Mailman-Users] receive your own posts problem

William Bagwell rb211 at tds.net
Thu Apr 11 20:57:57 CEST 2013

On Thursday 11 April 2013, Stephen J. Turnbull wrote:
> No, by definition it's a nasty feature, as it involves nonconformance
> to RFC 5322.

How so? I see two places in section 3.6.4. that suggest otherwise.
" A message
   identifier pertains to exactly one version of a particular message;
   subsequent revisions to the message each receive new message

So if a list adds a footer to the body of a message (many do) then that 
implies that the Message-ID /should/ be changed. Obviously Mailman does not 
want to break threading for no good reason. However fighting Gmail's 
annoying feature with a less annoying kludge is a good enough reason in my 

Just below, same section 3.6.4., top of page 25, "In all
      cases, it is the meaning that the sender of the message wishes to
      convey (i.e., whether this is the same message or a different
      message) that determines whether or not the "Message-ID:" field
      changes, not any particular syntactic difference that appears (or
      does not appear) in the message."

If the sender ticks the box telling Mailman to change the Message-ID then 
they get to take the heat. Other settings have brief descriptions / warnings 
so a sentence warning about breaking threading and the other issues you 
raise would not be out of place.

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