I have a server with Exchange 2000 running on Windows 2000. Incoming email is via SMTP and an ISDN dialup account. This usually works fine. Today we were not receiving emails and the Isp claims that they are not receiving an ETRN command. I haven't changed anything on the Exchange server and it all looks ok. Is there anyway of telling that an ETRN command is being sent (log files would be good..) TIA Andy