Mail 2.0 randomly not working

Bacically at 5:52am on September 6, my Mail stoped receiving my mail. I ran the Doctor and it said to check username and password for my mailbox (which is the same- no one played with my settings).
Does anyone know what to do?
Thanks

Could the server for the email service you use be down?

Its Easy Space- so I reckon not for two days. Ive just checked- i had 20mb allocated to that mailbox, and i was on 21.6. Ive increased it to 40 (it said it takes 4-8 hours) would that solve it?