I have setup and got working nagios running on Ubuntu 11.04 server. I have 10 servers reporting to nagios. my problem is i cant seem to find an entire answer for how to setup email notifications. Our domain has a SMTP server up and running correctly. we use it for our scan to email production. I have send mail installed on Ubuntu. I am asking for a link or a complete explanation on how to make send mail send me notifications via our Relay/SMTP server. I have successfully done the telnet on port 25 bit and it responds correctly. I have read and read but have not been able to figure out the rest of the pie. Any help is appreciated, THanks!