Jan P. Kessler: > As mentioned by other posters you should set up a real monitoring > system, that periodically checks your queue or generates an alert (e.g. > snmp trap) on the server which does not rely on the mechanism that you > are trying to monitor (here smtp).
To monitor an SMTP server, try to send a test message into it, and
raise an alarm if that test message is not delivered to mailbox or
smtp within some deadline.
Wietse
