I stumbled across Fastmail in a non-Google search for an email service provider when my Yahoo account was more a spamcatcher( a testement to their spam filters which I had set to high) than the business email I had opened the account for. I was rather skeptical, so I checked Fastmail out for a while then tested the free account and was very pleased.
I now have an enhanced account ( almost 2 years) and I'm not going anywhere else unless Australlia gets sucked down into the ocean. Then I s'pose I'll have to hunt up another email service; bollocks.