On Wed, Mar 4, 2009 at 12:02 PM, Paul McFerrin wrote: > I thank you both for enlightning me on this subject. > > I'm using the Thunderbird email client. I have observed that it is wrongly > using the "Return-Path" and not the "Reply-To" even in the email composing > phase before the ISP gets involved. I'll watch that more or seekout a RFC > compliant email client.
Thunderbird is one of the more obsessively-RFC-compliant mail user agents out there, and I would be quite surprised if this were the case. I see a bug reporting such behavior - https://bugzilla.mozilla.org/show_bug.cgi?id=396273 - but that turned out to be a side effect of the SMTP server, which was changing the From: address to match the Reply-To. This stuff is not hard to test: $ sendmail -t <<EOF From: from.addr...@example.com To: <my email address> Return-Path: return.p...@example.com Subject: Testing Where does a reply go? EOF When the message arrived in Thunderbird, I hit "reply"; it correctly addressed the reply to 'from.address', not 'return.path'. So I don't think your MUA is the problem. -- Mark J. Reed <markjr...@gmail.com> -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
