Venkatesh,
What version of NetBackup are you using?
If you have an SMTP for the system to use, you can configure this quite easily.
On the Administrator Console, go into the Host Properties for the master server.
On the 'Universal Settings' tab, enter an email address at the bottom.
Next, configure the nbmail.cmd file to use your SMTP server (you may need to install an SMTP sending program on the master).
You can read more about it here: http://seer.support.veritas.com/docs/274059.htm
(scroll down to the nbmail.cmd section)
Regards,
DP
Oh, just a side note: If you configure the Client Email notifications, the system will send an email for EVERY job that completes (regardless of the status).