Every so often we get customers that claim they can't log into our pop/imap/smtp relay server and it's a pain to go through step by step debug tests with them (when we know the issue is their end not ours)

I'm looking for a java applet or an exe that will accept a username and password in a form and then run login tests against for pop, imap and smtp possibly providing some basic traceroute or ping stats at the same time to confirm network availability.

Is there anything ready coded or would someone be willing to write this?