My Mac isn't receiving e-mails?

It was working just fine, and now it isn't receiving anything. There aren't any error messages or other windows that pop up telling me what's wrong. My network connection is strong, and I'm able to receive emails on my iPhone. Just not my laptop.

What could be wrong?

Yesterday, I registered it with my school's network, and I think that's when I noticed emails stopped coming in. But my actual internet browsing is just fine, of course.

Problem is with MAC. I suggest you Windows (7 or 8)
You can buy windows for MAC price and it is 3x better.
If you like to receiving mails just buy WINDOWS, not MAC

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