Problem with mail notifications

[m.siib]

Running Nagios 4.0.8 on Debian 7. Mail notifications are not being sent. I can send test email from the command line. Checked commands.cfg to check the path to mail and it is correct. Where can I look to troubleshoot? I've done it many times before with no issue, but this one is puzzling. If you want to suggest a never fail mailer to install, I'm ok with that.

[tmcdonald]

What command are you using from the command line to send mail, and as what user? What command do you have defined in Nagios to send mail? Are you able to run the first command as nagios instead of as root?

[m.siib]

As root or nagios:

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root@nagios:~# mail to [email protected]
Cc:
Subject: test

root@nagios:~#

I'm using the defaults in Nagios.

[slansing]

Can you share your nagios command which is responsible for sending notifications out? An let us know what guide (if any) you were following for this? The more info you can give us on how you set your mailer up, the better...

[m.siib]

Here are the notify commands - defaults. In troubleshooting I've also tried pointing to /bin/mail depending on the mailer.

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# 'notify-host-by-email' command definition
define command{
	command_name	notify-host-by-email
	command_line	/usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /usr/bin/mail -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$
	}

# 'notify-service-by-email' command definition
define command{
	command_name	notify-service-by-email
	command_line	/usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$\n" | /usr/bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$
	}

I wrote my own guide about five years ago that I've been following (link). I've had to adapt it for Debian 7 and it seems the mail part doesn't work as I'm used to. In my troubleshooting I've tried postfix, exim4, and sendmail with bsd-mailx, heirloom-mailx. I don't care which one is used, I just need something to work. If there is a start-to finish guide I'm willing to try anything.

[sreinhardt]

Is the mail server you intend to send to, on an internal or external network to the nagios system? Just wondering if you need to bother with spam filtering or if this is going straight through.

[m.siib]

Internal.

[m.siib]

I switched back to sendmail and bsd-mailx. I find that it works to send to external recipients, but not internal. I think the problem is that I'm sending to [email protected], but the nagios host is nagios.domain.com so maybe it's trying to deliver locally. What do I need to tweak?

[abrist]

Can you post a tail of the maillog after a failed send?

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tail -15 /var/log/maillog

[m.siib]

I got it working.

I added the following to /etc/mail/sendmail.mc

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define(`MAIL_HUB', `domain.com.')dnl
define(`LOCAL_RELAY', `domain.com.')dnl

EDIT: Locked, glad you have it working.