Perhaps LISTSERV does not have to do much to recognize troublemaking mail. If the FROM: address is non-conforming it should never be taken for commands or distributed on a list. The next question is what is non-conforming? My opinion: if it has any character not permitted by the appropriate RFC's, then it is non-conforming. That can probably eliminate the majority. As long as there are renegade and charlatan mail systems out there, life will be tough, but I don't see why we have to submit to it if it makes our work harder. I see no reason why Eric or anyone else should have to go out of their way to handle and process WRONGLY formatted mail. I say TRASH IT.