I switched from gmail to fastmail about six months ago and I'm very happy. It's fast, relatively cheap ($40 a year for 15 gigs of storage) and they aren't scanning my email to serve up advertisements. The addition of calendar is just another bonus that I'm immediately adopting.<p>Another great feature is the ability to use as many domains and email aliases as you want. I have all of my custom domains set up with both send a receive service, including DKIM. Also, if I ever need a throwaway email address, I just set it up, send an email, and then delete the address.