[rt-users] How to change the Email From Field??

[Stevo]

All,

I'm running RT3 and want to know how to change the From address on emails
send from within RT.

Currently the email header looks like this:

From: Nobody [mailto:nobody at tickets.xxx.com] On Behalf Of Stevo Devo via RT

Where do I make this change??  I can't find it anywhere!!!

Thanks

Stevo