To be honest Evolution's been odd for a while but anyway. Opening it up I wasn't asked for my password (I don't login to my computer now. No idea why. If anyone's got a cunning way of changing that, do tell. The request to put my p/w in comes randomly.) Today I can't open any emails. Essentially it's behaving as though there's not internet access (though as you can see, there is, cos I'm typing this.)
I see others have had problems like this with too on the Ubuntu forum. Hmm.