oops.... The standard message below lists "MSGack" as a valid option for setting my ACK option, which implies the shortest response allowed is "MSG". This doesn't work, I had to use "MSGACK" spelled out. Trivial, but I tripped over it. Drew ----------------------------Original message---------------------------- Dear networker, As of Tuesday, January the 20th of 1987, you have been added to the LISTSERV distribution list LSTSRV-L (The Revised LISTSERV distribution list) by Eric Thomas <ERIC@FRECP11>. Please note that you can change the amount of acknowledgement you wish to receive from this list upon completion of a mailing operation. The command to be used is the "SET" command, whose general syntax is "SET listname ACK|MSGack| NOACK". More information about this command can be found in the LISTSERV General Introduction guide which you can obtain by sending an "INFO" command to [log in to unmask] Virtually, The LISTSERV management