To change the reply-to address, put "reply-to" into the DIR/headerremove file and add "Reply-To: list@host.dom" to the DIR/headeradd file. Where DIR is the EzMLM list directory, and list@host.dom is the reply-to address you want to use. A popular use for this is to make the list address the reply-to address so that replies to list messages go back to the list.