When I restarted my computer and opened my email my earthlink and gmail where not there. It showed a moblie me account which I don't have but no mail in it

My computer froze for a bit so I restarted it. When I went to open my email (I use what comes on the macbook) none of my pop accounts showed. The mailbox layout looked slightly different than it usually does as far as placement of some of the keys but it looks like it is trying to show my mail through mobile me. I don't have a moblie me account but dont know how to restor my mail to show my gmail and earthlink in it and not moblie me. Does anyone have suggestions?