Between Gmail's catching unwanted emails and sending them to spam, and my filters that delete unwanted emails before they get to spam, I never have unwanted emails in my inbox.

But, being somewhat OCD by nature, I always check my spam folder just in case something I did want ended up there. I average about four new messages per day in my spam box. I'm just trying to preempt those four messages, which I could do if I understood the "rules" that Gmail uses with their spam filters.

tanstaafl.