Hey is an awesome email client on a terrible email server and Fastmail is an awesome server with a terrible client. I only wish there was a standard protocol we could use to mix and match!
I know it's pretty subjective, but I'd personally rate Fastmail's UI as one of the best I've used. The only real issue I have with it is that uncached searches could be faster.
Same - Fastmail's web UI is my primary MUA, with my phone being the secondary.
I agree. It would be amazing if we had something that allowed that. Maybe we could call it the “Internet Message Access Protocol” or IMAP...