No, nothing to do with SMTPUSER &co, it's just the 'EXECIO 0 CP' which I changed to Call Diag 8, which altered the value of 'result' and caused the 'file transferred to xxxx' message to be improperly displayed, with a copy to the RSCS file origin... which in this case happens to be SMTPSERV. This bug has been fixed, but the problem still remains: must I send this message as a file (and possibly get a rejection notice back from the MAILER, if the RSCS origin is a MAILER -- possibly one not in the tables), or as an interactive message, and get flamed because it's an important message and it was lost in the network? I've presently opted for interactive message. Eric