Ah, then it's not mail distribution but an attempt at distributing a file to some user with a domain-style address. LISTSERV then makes a mail envelope around the file, and if the user doesn't exist it gets a nastygram back. You don't want to put the user's address there because one of the purposes of DISTRIBUTE is *not* to get zillions of 'Sent file' messages; I'm not sure the users would like to trade them for '*Mail sent to' messages :-) Eric