Notification Emails

[Richard Clark]

On 4 May 2011, at 16:03, Daniel Ceola <DCeola at twgi.net> wrote:

Hello all!



My company recently migrated to a new exchange email server (ex03 -> ex10).
 Nagios has been up and running wonderfully in our environment for some
while (was running when I started working here).



I have discovered that the notification emails were being routed through the
now nonexistent ex03 server in our network.  Since we have taken that system
down, we are now not getting any notification emails.



>From what I understand, and have been told – our Nagios installation was
performed on Ubuntu, basically using the info I the quick-start install
guide.  As such, this should mean that the system is using mailx to send
emails (as its own mail server) and thus simply using our internal MX
records to route email to our mail server.  Our MX record was updated on the
day that we made the final server cutover, and it didn’t affect receiving
email from Nagios.





The question here is this:  Is there somewhere within Nagios or the Ubuntu
OS that I need to make a config change to route the notification email
through the new internal mail server to the recipients?



I know we are still ironing out some kinks in our new exchange system, so if
there is not a configuration within Nagios/Ubuntu that affects this, I will
continue the search for resolution through my exchange system.



Thanks,



Daniel Ceola

Systems & DB Admin

Nagios doesn't send mails in itself, it only calls the commands that its
configured to based on the criteria that you set. One of which may well be
the sending of a mail.
Grep through your nagios configuration to see which command it's actually
calling.

The default MTA for Ubuntu is postfix - sounds like it may have been
configured to use an SMTP relay rather than MX based routing.
'dpkg-reconfigure postfix' should give you an ncurses-based wizard if you're
not comfortable with postfix configuration.
Also, check logs at /var/log/mail.*
and probably worth checking if someones done something silly like put a
static hostname entry for a mail server in /etc/hosts


Cheers,
--
Richard Clark
richard at fohnet.co.uk
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