Quote Originally Posted by Pwnagraphic View Post
Well where I'm getting at is.. I can check my e-mail on multiple computers, phones, tablets, etc.. So if my home ISP is Comcast, I have to worry about not getting e-mails even when I'm at work on a different internet service? That's what I'm not understanding. Unless comcast has an e-mail also that I don't know about. If so, I get it lol.
Their email is @comcast.net(or .com). When emails come into your mailbox, ie in Comcast's servers, they decide this email is spam and delete it. So when you check your mail, it's not there. They delete it before it really even hits your inbox.

Should always ask if you want certain email marked as spam, but that would be too much work for some people so the filters are automatic most of the time.