On Sat, Mar 20, 2004 at 05:55:48AM -0800, Hallam-Baker, Phillip wrote:
From:owner-ietf-mxcomp(_at_)mail(_dot_)imc(_dot_)org; on behalf of;
Mark C. Langston [mark(_at_)bitshift(_dot_)org]
Reply-To: Mark C. Langston [mark(_at_)bitshift(_dot_)org]
I was thinking about envelope-from but yes, this is true as well.
Why would this be anyone other than the postcard site?
Because they are unwilling to receive their junk back. I've seen
things as bad as:
HELO mailhost.domain.tld
MAIL FROM: <user(_at_)domain(_dot_)tld>
RCPT TO: <user(_at_)domain(_dot_)tld>
DATA
...
Reply-to: user(_at_)domain(_dot_)tld
Errors-to: user(_at_)domain(_dot_)tld
From: user(_at_)domain(_dot_)tld
To: user(_at_)domain(_dot_)tld
Subject: Otheruser(_at_)otherdomain has send you an e-card
...
What use if made of envelope from by the MUA or MTA in any case?
At the moment it appears to be completely unnecessary.
Bounces.
Alex