Looks like your postfix installation isn't really complete since /bin/mail still thinks it's supposed to send using sendmail. On a complete postfix setup you should have a command "sendmail - Postfix to Sendmail compatibility interface" which I believe /bin/mail will use. So the issue here isn't really Nagios-specific, since you're unable to send mail with /bin/mail outside of Nagios as well. If you fix the email setup, Nagios notifications will be delivered just fine, and Postfix setup is too off topic for this list :-) Good luck! <div class="gmail_quote">On Thu, Oct 1, 2009 at 10:23 PM, Scott Miller <<a href="mailto:srmiller@interbel.net">srmiller@interbel.net</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div link="blue" vlink="purple" lang="EN-US"> <div> [root@mail4 ~]# echo "Hello world" | /bin/mail -s "Test Email" root@localhost [root@mail4 ~]# /etc/mail/<a href="http://sendmail.cf" target="_blank">sendmail.cf</a>: line 0: cannot open: No such file or directory [root@mail4 ~]# I’m running postfix – not sure why it’s looking for sendmail. <div style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0in 0in;"> From: Martin Melin [mailto:<a href="mailto:mmelin@gmail.com" target="_blank">mmelin@gmail.com</a>] Sent: Thursday, October 01, 2009 11:01 AM To: <a href="mailto:nagios-users@lists.sourceforge.net" target="_blank">nagios-users@lists.sourceforge.net</a> Subject: Re: [Nagios-users] FW: Not sending e-mails </div><div><div></div><div class="h5"> Try simply copying the command_line for notify-service-by-email and running it in a shell yourself. Or just do: # echo "Hello world" | /bin/mail -s "Test Email" root@localhost <div> On Thu, Oct 1, 2009 at 8:28 PM, Scott Miller <<a href="mailto:srmiller@interbel.net" target="_blank">srmiller@interbel.net</a>> wrote: <div> <div> Scott Miller wrote: >> I know this has been hit over and over, and I've read literally everything I >> could find, but to no avail. I have a newly install of Nagios 3.2.0 on a >> Fedora Core 8 with Postfix/Dovecot. I have a modified script (postfix mail >> queue monitor I shared a week or so ago). The only thing Nagios is doing on >> this box is looking at local services. When I change any threshold so I >> will go into alarm, it does, but no e-mails get sent out. >> >> I can see in my logs the following when something comes into alarm: >> >> [1254408621] SERVICE ALERT: localhost;Postfix Mail >> Queue;CRITICAL;SOFT;1;CRITICAL: Postfix mailq has 14 messages queued for a >> total of 12492 Kbytes. >> [1254408651] SERVICE ALERT: localhost;Current Load;OK;SOFT;2;OK - load >> average: 4.87, 2.73, 1.43 >> [1254408681] SERVICE ALERT: localhost;Postfix Mail >> Queue;CRITICAL;SOFT;2;CRITICAL: Postfix mailq has 16 messages queued for a >> total of 12497 Kbytes. >> [1254408741] SERVICE ALERT: localhost;Postfix Mail >> Queue;CRITICAL;SOFT;3;CRITICAL: Postfix mailq has 16 messages queued for a >> total of 12689 Kbytes. >> [1254408801] SERVICE ALERT: localhost;Postfix Mail >> Queue;CRITICAL;HARD;4;CRITICAL: Postfix mailq has 15 messages queued for a >> total of 12494 Kbytes. >> [1254408801] SERVICE NOTIFICATION: nagiosadmin2;localhost;Postfix Mail >> Queue;CRITICAL;notify-service-by-email;CRITICAL: Postfix mailq has 15 >> messages queued for a total of 12494 Kbytes. >> [1254408801] SERVICE NOTIFICATION: nagiosadmin;localhost;Postfix Mail >> Queue;CRITICAL;notify-service-by-email;CRITICAL: Postfix mailq has 15 >> messages queued for a total of 12494 Kbytes. >> >> Wondering if anyone could double check the pertinent parts of my config? >> >> Thanks in advance. >> >> Scott Miller > > What's in your mail log? Nagios is trying to send notifications using > the command you've defined, according to the logs. You haven't provided > the definition for that command (notify-service-by-email), but I assume > it's trying to send an email. > > If you're using anything like the example commands that come with > Nagios, it is probably using something like "/bin/mail" to send the > message, and your mail log would be a good place to look for why it's > not being delivered. </div> </div> Sorry - didn't include that from the commands.cfg - Here's what I have. commands.cfg ============ # '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" | /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$SERVICEOUTPUT$" | /bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$ } This is the exact same way I have it on another machine running checks for multiple boxes and devices. The only difference, is this server is running Postfix, the other (working) is running Sendmail. In my logs: /var/log/maillog - grep for nagios - there's nothing /var/log/messages shows Oct 1 10:53:20 mail4 nagios: SERVICE NOTIFICATION: nagiosadmin2;localhost;Postfix Mail Queue;CRITICAL;notify-service-by-email;CRITICAL: Postfix mailq has 13 messages queued for a total of 3326 Kbytes. Oct 1 10:53:20 mail4 nagios: SERVICE NOTIFICATION: nagiosadmin;localhost;Postfix Mail Queue;CRITICAL;notify-service-by-email;CRITICAL: Postfix mailq has 13 messages queued for a total of 3326 Kbytes. Looks like it's trying - maybe something in Postfix stoping it? I'll have to do a bit more digging and testing. Scott Miller <div> <div> ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. 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Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! <a href="http://p.sf.net/sfu/devconf" target="_blank">http://p.sf.net/sfu/devconf</a> _______________________________________________ Nagios-users mailing list <a href="mailto:Nagios-users@lists.sourceforge.net">Nagios-users@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/nagios-users" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagios-users</a> ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null </blockquote></div>