On 28 September 2012 06:29, Ryan Novosielski <user-ae4522577e16@xymon.invalid> wrote:
Xymon 4.2.3 here still. For some reason, smtps doesn't test properly.
From my tests, that server is not listening on port 587, or is being
blocked by a firewall/router. But perhaps access is restricted.
Assuming port 587 is open to you, you can test the SSL negotiation using
openssl:
$ openssl s_client -connect mail.umdnj.edu:587 </dev/null
This should show you certificate details. If it doesn't then there was no
(valid) SSL handshake.
At the very least, you should be able to connect with telnet:
$ telnet mail.umdnj.edu 587 </dev/null
This should show "Connected" and then immediately "Connection closed". If
not, then you have a more elementary problem. If you get "Connection
refused" then the service is probably not running. If you get a timeout,
then there is probably a firewall/router blocking your packets.
Cheers
Jeremy