check_smtp socket timeout problem

[Lane, Jim]

Hi, All 

I'm not sure this is a Nagios problem strictly speaking but hopefully
people here may be able to shed some light on it. 

I have a set of 4 Solaris 10 boxes one of which is the Nagios server,
Nagios 2.6 to be exact. The other 3 boxes are monitored by it.

One thing I'm checking is SMTP with the plug-in check_smtp. As far as I
know all 3 monitored boxes have the same configuration aside from host
names and IP addresses. Sendmail is set up and working on all 3 boxes. I
know this because I'm receiving messages from them on my laptop. The
problem is that for 1 of the 3 the check_smtp plug-in times out. When I
try it from the command prompt I get messages as follows: 

jlane at cbaobus-cbbwls2 /usr/local/nagios/libexec $ ./check_smtp -H
10.3.245.196 -v
220 cbaobus-cbbipl1 ESMTP Sendmail 8.13.6+Sun/8.13.6; Tue, 13 Feb 2007
09:55:31 -0500 (EST)
CRITICAL - Socket timeout after 10 seconds

When I check on the failing server I see syslog messages such as:

Feb 13 09:55:41 cbaobus-cbbipl1 sendmail[28731]: [ID 801593 mail.info]
l1DEtVQd028731: cbaobus-cbbwls2 [10.3.245.204] did not issue
MAIL/EXPN/VRFY/ETRN during connection to MTA-v4

every 5 minutes corresponding to Nagios running the check_smtp plug-in. 

Does anybody know what this message is trying to tell me? 

Regards,
Jim Lane 

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