See this technote about use of the bpstart_notify.bat & bpend_notify.bat:

http://www.symantec.com/business/support/index?page=content&id=TECH36460

I don't use it ( I don't want thousands of emails every day)

in master server properties Global Attributes there is a place to put emails address(s)

I think it might email all starts and ends ( have not used it)  would be easier than the bp notify scripts on each and every server.

If all you need is to know when all of the jobs for a specific client COMPLETE, you can use the "Client Administrator's Email" in the Client Properties --> Universal Settings tabs for individual clients.  Note that this option does't notify when the job starts, and it sends notifications for ALL job types (backups, restores, etc.), whether successful or not, and if you have multiple streams enabled for the client, each stream sends a separate notification. 

On a Windows Master/Media server setting Global or Universal attributes alone won't get you notifications. It also requires the installation of Blat to provide an SMTP mailer facility...this should also be covered a bit in the NBU documentation. Once Blat is installed on the server all you need to do is modify the required scripts (ex. nbmail.cmd, bpstart_notify, etc)

You can also email every morning the result of commands like:

bperror -U -backstat -hoursago 24 -server MyServer -by_statcode

and you have every day a summary of all your backups in only one mail !

But the best method is now to send a report by means of OpsCenter (a NetBackup 7 component, but compatible with NetBackup 6.5).