I'm sorry, i don't have the answer to your question. I have the same problem with linpopup. I can send messages with "smbclient -M destination_host" but i can't send or receive messages trough LinPopup. My question to you isone is if you succeded making linpopup working, and i you did, if you can "share" the solution to me. I imagine that in 2 months you tried some tricks, and you could make me gain some time, so i can focus on the nice things.