Vincent Danen writes:
> Hi there. I can't seem to figure this one out. It's like sendmail
> is re-writing the Return-Path header and it's making my posts to some
> mailing lists bounce for some reason.
>
> I insert a my_hdr Return-Path:... statement into the .muttrc for
That is a pretty useless thing to do, according RFC 822.
4.3.1. RETURN-PATH
This field is added by the final transport system that
delivers the message to its recipient. The field is intended
[This implies that there is only one Return-Path: header.
This implies that the final transport is free to modify/
discard any existing Return-Path: field.]
to contain definitive information about the address and route
back to the message's originator.
Note: The "Reply-To" field is added by the originator and
serves to direct replies, whereas the "Return-Path"
field is used to identify a path back to the origina-
tor.
While the syntax indicates that a route specification is
optional, every attempt should be made to provide that infor-
mation in this field.
And again in 4.4.3 REPLY-TO / RESENT-REPLY-TO:
Note: The "Return-Path" field is added by the mail transport
service, at the time of final deliver. It is intended
to identify a path back to the orginator of the mes-
sage. The "Reply-To" field is added by the message
originator and is intended to direct replies.
There are some further details in RFC 1123, sections 5.2 and 5.3.
