I've been able to get a normal mail monitor to check SMTP, IMAP and POP3 but when I use the User Experience Monitor I get:
Testing on node <pop3server>: failed with 'Undefined' status Unhandled exception occured during checking test e-mail. Original Exception message is: No IPv4-compatible end point found..
I've been able to just telnet from the server on port 110 fine so I don't understand why this monitor throws an exception.
If I log into the mail account I am testing through webmail, the message is there waiting to be checked against.
I'm currently running an evaluation version to see if we can get APM running well in our environment so I don't have access to support.