I have found a good one:
Inbox.eu from Lativa.
Ads, Spam and Virus free email with yourname@yourdomain free registration is available for up to 3 users (mailboxes) per domain.
20G storage, File storage too.
There is Migadu but it has weird daily limitations. It is just so low even for free.
@Jarland Can you offer 1 or 2G of free hosting for single domain for all? Or is it not feasible only. Sorry if I encroached my limits.
Do you know any other?