Configure a Linux mail server

How to configure a Linux mail server?

by default if linux is fully installed then sendmail comes by default configured on it . just make it start

and also change
Transfer
smtp 25/tcp mail # Simple Mail Transfer
smtp 25/udp mail # Simple Mail Transfer

smtp 26/tcp mail # Simple Mail Transfer
smtp 26/udp mail # Simple Mail

in /etc/services file.

then service sendmail restart
on command prompt as root login and

then execute your perl code . i am sure u wilget through.