Nagios Email not working

[kvnguyen89]

Hi all,

I installed Nagios Core onto Ubuntu 18.04. I cannot get the Nagios email to work. I am not sure what I am doing wrong. I followed many advice from the past fourm but still cannot get it to work. Can someone please help me?

contacts.cfg

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# CONTACTS
#
###############################################################################

# Just one contact defined by default - the Nagios admin (that's you)
# This contact definition inherits a lot of default values from the
# 'generic-contact' template which is defined elsewhere.

define contact {

    contact_name            nagiosadmin             ; Short name of user
    use                     generic-contact         ; Inherit default values from generic-contact template (defined above)
    alias                   Nagios Admin            ; Full name of user
    email                   [email protected] ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ******
}



###############################################################################
#
# CONTACT GROUPS
#
###############################################################################

# We only have one contact in this simple configuration file, so there is
# no need to create more than one contact group.

define contactgroup {

    contactgroup_name       admins
    alias                   Nagios Administrators
    members                 nagiosadmin
}

command.cfg

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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 $HOSTSTATE$ **" $CONTACTEMAIL$
}



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 $SERVICESTATE$ **" $CONTACTEMAIL$
}

template.cfg

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define contact {

    name                            generic-contact         ; The name of this contact template
    service_notification_period     24x7                    ; service notifications can be sent anytime
    host_notification_period        24x7                    ; host notifications can be sent anytime
    service_notification_options    w,u,c,r,f,s             ; send notifications for all service states, flapping events, and scheduled downtime events
    host_notification_options       d,u,r,f,s               ; send notifications for all host states, flapping events, and scheduled downtime events
    service_notification_commands   notify-service-by-email ; send service notifications via email
    host_notification_commands      notify-host-by-email    ; send host notifications via email
    register                        0                       ; DON'T REGISTER THIS DEFINITION - ITS NOT A REAL CONTACT, JUST A TEMPLATE!
}

nagios.cfg

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# You can specify individual object config files as shown below:
cfg_file=/usr/local/nagios/etc/objects/commands.cfg
cfg_file=/usr/local/nagios/etc/objects/contacts.cfg
cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg
cfg_file=/usr/local/nagios/etc/objects/templates.cfg
cfg_file=/usr/local/nagios/etc/objects/pmmservers.cfg


# NOTIFICATIONS OPTION
# This determines whether or not Nagios will sent out any host or
# service notifications when it is initially (re)started.
# Values: 1 = enable notifications, 0 = disable notifications

enable_notifications=1

[benjaminsmith]

Hello @kvnguyen89

Also, take a look the your definitions for hosts and services. For example, make sure you have directives to determine when notfications should be sent, so for example, warning, critical...etc.

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define service{
	host_name		linux-server
	service_description	check-disk-sda1
	check_command		check-disk!/dev/sda1
	max_check_attempts	5
	check_interval	5
	retry_interval	3
	check_period		24x7
	notification_interval	30
	notification_period	24x7
	notification_options	w,c,r
	contact_groups		linux-admins
	}

Also review your log file for errors in /var/log/maillog

Nagios Core Object Definitions
https://assets.nagios.com/downloads/nag ... ml#service