Yes, obviously no problems -- Fastmail is the gold standard for indy email hosting. I don't want "integration" from my email provider. Their web client is so go

Yes, obviously no problems -- Fastmail is the gold standard for indy email hosting. I don't want "integration" from my email provider. Their web client is so good I have stopped using native imap clients. On mobile I use the native exchange client with my own service that proxies to imap, so I can't say anything about their mobile support. Recently we lost connectivity from our colo to their IMAP endpoint and although I already knew it was some BGP cluster-f, I pitched in a support ticket just to see what would happen. Received a reply noting the known BGP cluster-f peering with <our transit provider> and providing the exact time that connectivity had been restored. Can't expect much better than that. They actually responded quicker than our transit provider did.