That's fair! I didn't know they were offering that. I think it's a recent development -- it's not generally available ("contact us"), and it seems more focused at enterprise-type deployments than end-user mail that your typical Fastmail/Protonmail/etc.
But for the original question:
Is there any email hosting out there with support for JMAP?
Stalwart really isn't a practical answer, at least yet.
Comments
Also https://stalw.art/
Stalwart is a mail server program, not a live email server you can pay someone money to use.
One can of course use Stalwart to run a hosted email service.
https://stalw.art/managed-email/
That's fair! I didn't know they were offering that. I think it's a recent development -- it's not generally available ("contact us"), and it seems more focused at enterprise-type deployments than end-user mail that your typical Fastmail/Protonmail/etc.
But for the original question:
Stalwart really isn't a practical answer, at least yet.
Thundermail uses Stalwart