Once upon a time Mike Ramundo ([log in to unmask]) wrote: ><blush> I have a would-be subscriber sending from a site that adds a >"Sender: postmaster@......" header to every message in addition to >the user's "From:" My initial " don't do that !!!" resulted in a >quote from RFC822 ( sec 4.4 -> 4.4.4 ) ( definitions of FROM/SENDER ) >The original reject from LISTSERV follows - How SHOULD I advise this >user ??? - mike The Sender: header-field should only be used by mailer-deamons and other programs to return error-messages concerning delivery and the like. Your mailing-list software should use the From: header or (if present) the Reply-To: header as the subscriber's address. So, if your subscriber makes a mistake in the syntax or format of the command th mailing-list robot should use the Reply-To: or From: header to return an error message. -- Maurice Hendrix INTERNET:[log in to unmask] ARM Powered Newton didn't invent gravity... ...The Blue Wave packets are not in the main computer.