How do you know if nis 09 is working in email?

Hello, I have xpsp2 NIS 09 fully updated on all fronts, Ive always wondered how norton works in email exactly, my email in online thru my isp (comcast) and other would be yahoo or like.

 

Ive never been able to ask it to scan them or am too dumb to know. I just assumed email scanning was for outlook users.

If you tell me how to set it up be gentle I learn slow LOL.

 

Thanks for input.