Yeah. I am amazed that people don't get it right. My server sends out messages looking like this:
From: anXXXXX@anon.penet.fi Reply-To: anXXXXX@anon.penet.fi Sender: anon@anon.penet.fi
And there are _lots_ of systems out there that send te reply to "anon@anon.penet.fi"! Elm and VMSMail are the most obvious ones.
Even worse, there are mailers that respond to the out-of-band sender information that appears in the first line (not in the header!) as the "From " information. Bounce message (almost) always go back to the out-of-band sender, so we changed the cypherpunks list alias on toad.com to generate that as the out-of-band sender. Now bounce message return to a different mailbox and my inbox at toad.com is clear for regular list maintenance. Nonetheless, I still get a number of attempted posts to the mailing list at large _and_ requests for list maintenance (?!) to the owner-cypherpunks alias. If only mail software were consistent, ... Eric