-----Original Message-----
From: Jon Kyme [mailto:jrk(_at_)merseymail(_dot_)com]
Sent: Monday, April 19, 2004 1:12 AM
To: Harry Katz
Cc: ietf-mxcomp(_at_)imc(_dot_)org
Subject: Re: A proposal on identities
BTW, it's come to our attention that some MTAs today insert
additional
headers in the message whenever they forward mail. Postfix
and qmail
apparently insert a header called Delivered-To and exim inserts an
Envelope-To header. Although these headers are not defined
in RFC2822,
they seem to be in fairly widespread use. We could consider adding
them to the list of headers in step 2, after Resent-From
and before Sender.
FYI, a default Exim configuration DOES NOT add an Envelope-To
header, and will (by default) remove it if present, since
this header should not be present in messages in transit.
(
http://www.exim.org/exim-html-4.30/doc/html/spec_44.html#IX244
8 ) I'm sure you could consider any header added by
mis-configured and home-rolled MTA in your scheme, but I'm
not sure how useful that would be.
Thanks for the correction. This is indeed not on by default in Exim.
However, my understanding is that the header, if turned on, is preserved
if the message is forwarded due to a .forward file.