[Mailman-Developers] [Mailman-Users] Sender field

[Neal Groothuis]

John W. Baxter wrote:
> Probably, indeed.  But what happens if that header was already "taken" in
> the process that brought the message to mailman for distribution to the
> list?

As I noted in my previous response, I believe that the correct field (if 
Mailman were to add a "Sender:" header) to add would be "Resent-Sender". 
  Please see RFC 2822, section 3.6.6.  The "Resent-Sender" field may be 
multivalued, so this isn't a problem.  However, Mailman should not be 
modifying the Sender: field at all.

"Original-Sender" is a header used when gatewaying X.400 messages into 
RFC 822 messages for use in JNT mail networks.  It would not be 
appropriate for use here.


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