I'm about 98% ready to leap off Gmail for good and I was going to consider Fastmail but unfortunately won't, due to this.

The ones I'm considering are Microsoft 365, Protonmail, Tutanota and Posteo. Seems tough to pick between them. For me, the most important things are:

* Catchall * Multiple custom domains (Protonmail charges for each additional?) * Desktop app support (Protonmail has the bridge but apparently it doesn't work all that well) * Easy (or at least reasonable) to import my email history from Gmail into the new provider either via Download->archive->Upload (Microsoft 365) or direct migration (Fastmail).

Argh.

This is an interesting nut to crack. I'd be willing to bet there's a SaaS space here for someone who can figure it out.