File send_mail.cfg of Package nagios-eventhandlers-send_mail

[global]
# please fill in at least these settings:
mailhost=localhost
maildomain=example.com
mailfrom=User for Nagios <nagios@example.com>
mailtimeout=30
# those settings are optional:
logfile=/var/log/nagios/mail.log
mailsubject=** Nagios Notification **
mailuser=mailserver_username
mailpassword=mailserver_password
loglevel=2
debug=0