No, LISTSERV cannot just force userid@node in the from field in that case. It calls the RFC822 parser to get info from the header and the parser says "Sorry, this is just no valid RFC822 mail". And it is indeed not -- it's IBM NOTE sent as MAIL. If it's not a valid RFC822 mailfile, it can be anything, X.400 mail, local homebrew mail, or just a standard file which happened to have a filetype of mail. Alan: you cannot set the default option to NOFILES, but you can issue a SET listname NOFILES FOR userid@node as they subscribe. Eric