* Marvin Renich via Postfix-users <postfix-users@postfix.org> [241018 08:14]:
> My apologies!  I had explicitly set Reply-To, and expected the mailing
> list software to _not_ replace it.

Okay, it seems that the list software _adds_ the original sender to the
existing Reply-To header.  So if I don't set Reply-To, it just has my
email.

> Wietse:  Can the mailing list software be changed in two separate ways:
> 
> 1.  Do not add the original sender to Reply-To.  It is expected that
> someone sending to a mailing list is also reading the list unless they
> explicitly state otherwise.  A Reply-To that includes both the mailing
> list and the original sender causes the original sender to get duplicate
> emails of every reply.  This is contrary to long-standing mailing list
> etiquette.
> 
> 2.  If an email to the list has an explicit Reply-To, do not replace it.

Wietse:  Ignore 1 above.  Please just change it to respect a specified
Reply-To without modification (2 above).  From RFC 5322:

   The originator fields also provide the information required when
   replying to a message.  When the "Reply-To:" field is present, it
   indicates the address(es) to which the author of the message suggests
   that replies be sent.  In the absence of the "Reply-To:" field,
   replies SHOULD by default be sent to the mailbox(es) specified in the
   "From:" field unless otherwise specified by the person composing the
   reply.

One of the original intended uses of Reply-To, AIUI, was if the sender
did not want replies to go to the From address (e.g. sending from
ISP-mandated email, but replies should go to vanity email).

> Thank you.
> 
> ...Marvin
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