====== SSMTP ======

In Debian based systems:

apt-get install ssmtp



Then edit the configuration file in /etc/ssmtp/ssmtp.conf

A sample configuration to use your gmail for sending e-mails:

# root is the person who gets all mail for userids < 1000
root=your@email.com

# Here is the gmail configuration (or change it to your private smtp server)
mailhub=smtp.gmail.com:587
AuthUser=your@gmail.com
AuthPass=yourGmailPass
UseTLS=YES
UseSTARTTLS=YES
Note: Make sure the "mail" command is present in your system. mailutils package should provide this one in Debian based systems.