SMTP EMail for PHP On Ubuntu

installing pear package for php: apt-get install php-pear

Installing PEAR Mail for PHP On Ubuntu

sudo apt-get install php-pear

sudo pear install mail

sudo pear install Net_SMTP

sudo pear install Auth_SASL

sudo pear install mail_mime
start/stop/restart apache web server:
/etc/init.d/apache2 restart
/etc/init.d/apache2 start
/etc/init.d/apache2 stop