Hmm... You're right, but I had previously added a test (from the very first version) to transfer everything sent directly to the LISTSERV machine to the postmaster, to make sure that people used to the NCSUVM-type LISTSERVs would get an error message when mailing to "listname <LISTSERV@FRECP11>". Also, I was afraid of possible loops during the testing period. But, well, tout bien consi- dere, I decided to modify it as you suggested. I have added a NOTIFY userid@node ON|OFF command that will allow full-duplex links between two FRECP11-type LISTSERVs (so to speak). And for better safety I added a test that makes it reject any mail with a subject starting with "Ack:" (it sends back an acknowledgement with "Subject: Ack: original_subject"), which means that you won't get any loop even if you forget the NOTIFY OFF command. Eric