For anyone interested in moving over to Fastmail, if you use this referral link, you can get 10% off your first year:
https://ref.fm/u15257689
In addition to the options in the e-mail mentioned by John Capo, I would also suggest a look at
Purelymail.They have a slightly different take on their
pricing, but there have been good reports about their service. There's also extensive discussion on their service
here on the forum.