Here is another informative tip from Leo A. Notenboom using Camtasia Studio 2.
It might be tempting to simply delete e-mail from anyone you don’t know, but that’s harsh, and can result in losing e-mails you actually wanted to receive anyway.
But it’s certainly easy to set up a rule to help prioritize the e-mail you’re getting, so you can look at the e-mail from people you know quickly, without being forced to wade through a ton of SPAM to do it.
http://channels.lockergnome.com/windows/videotips/13/
Hope this is helpful.