I recently received a complaint from the owner of a list which is set to Reply= Sender. When a subscriber from AOL posts to the list, all the copies to AOL subscribers bounced with this error: http://postmaster.info.aol.com/errors/554rlysn.html, "This error indicates you are sending email as AOL.COM, or one of its affiliates from an unauthorized IP address." It's true that with Reply= Sender Listserv does that, but what's the alternative? Is there a way to prevent AOL from bouncing the mail while keeping Reply= Sender? Peter