Nagios Support Forum

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sudo apt-get install ssmtp

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#Config file for sSMTP sendmail
#
# The person who gets all mail for userids < 1000
# Make this empty to disable rewriting.
[email protected]
#I recommend setting this 

mailhub=smtp.gmail.com:587

# Where will the mail seem to come from?
rewriteDomain=

#The full hostname
hostname=harenhall.the.realm
UseTLS=YES
UseSTARTTLS=YES
AuthMethod=LOGIN
[email protected]
AuthPass=nagios852

# Are users allowed to set their own From: address?
# YES - Allow the user to specify their own From: address
# NO - Use the system generated From: address
# This is optional if you're going to use revaliases - I didn't
FromLineOverride=YES

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sudo chown root:nagios /etc/ssmtp/ssmtp.conf
sudo chmod 640 /etc/ssmtp/ssmtp.conf

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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" | /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" | /bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$
        }

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May 17 11:05:12 lannister sendmail[4550]: alias database /etc/mail/aliases rebuilt by administrator
May 17 11:05:12 lannister sendmail[4550]: /etc/mail/aliases: 0 aliases, longest 0 bytes, 0 bytes total
May 17 11:05:13 lannister sm-mta[4616]: starting daemon (8.14.4): SMTP+queueing@00:10:00

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echo "testing for nagios alerts"|mail -s "test nagiosalerts" [email protected]

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mail: Cannot open mailer: No such file or directory
mail: cannot send message: No such file or directory