[LightBug1]

But where is the current greener grass?

I keep seeing fastmail here. Is that the best alternative right now?

[Gud]

The e-mail provider is less important. Just make sure it’s pointed to a domain you own

[vel0city]

I migrated some family email to Zoho the other day. There's a decent free tier and their email service alone is pretty cheap ($1/user/mo). For $1.25 you can get exchange activesync support as well.