FC9 - Nagios Email Notification issue

[scottro]

Usually, I've left the mail at default. In postfix, you should add that relayhost line that was mentioned in the early part of the thread.

So, you can send manually. Does the exchange server require authentication?

If so, I believe that nagios mails are sent by user nagios, so that might be the problem.
Is there anything in /var/log/maillog indicating that nagios is trying to send the message?

[cluckinchicken]

Exchange server allows anonymous authentication.
Added relayhost to main.cf


Is there anything in /var/log/maillog indicating that nagios is trying to send the message?
--I don't see any attempts like I saw before...

[scottro]

Oct 12 21:15:57 CN01 postfix/qmgr[2271]: 2368640F011: from=<nagios@servername.domain.
com>, size=585, nrcpt=1 (queue active)

Usually there are entries like that.
Also test with the mail command that you can send mail. (That is, the way you did before, that failed.)

[cluckinchicken]

nothing from the nagios user. just entries from my test messages, run manually. went through my cfg's and they look valid.

[cluckinchicken]

in the nagios user mailbox, the messages are queued up, and delayed for 5 days.

451 <domain>: Name server timeout

[scottro]

Hrrm, that's not good. Postfix *is* running, right? (pgrep master is the command to use to check.)

Please try to send mail from command line and in another terminal do

tail -f /var/log/maillog

which will print the error messages as they occur. Sorry, my brain is frazzled tonight, there's a good chance there's a simple answer to this. Hopefully, someone who is better at troubleshooting postfix than I am will see this and tell us.

[cluckinchicken]

so on sunday, last change was on friday, my notifications started coming through. although they were queued and delayed....that's quite the delay!

I think I'm solid now! Thanks all for your comments/suggestions/input. Much appreciated!

[scottro]

That is rather odd. I imagine we've overlooked something, but I'm not sure what. As long as it's working now, that's great.