The problem had always existed in fact, but there was a bug in 1.5n which prevented LISTSERV from actually enforcing locked users. Without this, you'd have a loop between LISTSERV and SMTPSERV, unless SMTPSERV can be configured to throw out stuff from LISTSERV. I don't know what SMTPSERV is, I just know that you can prevent LISTSERV from sending it mail by adding SMTPSERV@nodeid to the TRAPOUT variable in LOCAL SYSVARS, or maybe you could prevent SMTPSERV from sending to LISTSERV. Eric