Here. If you scroll down a bit it’s the one on the very right called “Mail service”. It’s mail only though, so no kDrive.

I’ve been with Infomaniak for some time now and quite happy. Their 1.50 EUR for 5 mailboxes is hard to beat. I mainly chose them as they offer a decent android app , which is also open source and on f-droid. They are also as far as I know the only provider, apart from fastmail, that offer proper email threads/discussions, i.e. where your responses are shown alongside the received emails within the same thread. I haven’t tried out all providers though so I’d be interested to hear if there are others with this feature. Unfortunately the app can be a bit sluggish at times but it’s mostly serviceable.