Check to see if SMTP is reponding on port 25

[dbreaux]

Can Nagios test to see if an SMTP server is responding via port 25? Just something to do a HELO and validate a response...almost like a ping.

[scottwilkerson]

Yes.

In XI we have the Mail Server Monitoring Wizard to make is very easy to check any or all of the following...

Ping -Monitors the server with an ICMP "ping". Useful for watching network latency and general uptime.
SMTP -Monitors SMTP service availability.
IMAP -Monitors IMAP service availability.
POP -Monitors POP service availability.

[dbreaux]

Thanks for the quick response.

For clarification purposes...does the SMTP check on Mail Server Monitor Wizard just check that the service is available, or does it shoot a request over port 25 and then listen for a response?

I'm sorry for the stupid questions, but my management is asking me and I can't find anything definitive online.

Thanks!

[scottwilkerson]

It checks port 25

But we do have the ability to do service checks in Nagios XI as well.