Temporary migrated my emails to runbox. It operates since 2000, hosted in Norway, have all standard features and protocols available, the costs and message limits are quite nice.
Migadu was on the top of my list, but 20message/day limit on micro plan and 9$/month on mini plan is too much for me at the moment. Probably, I can solve it, but it requires more time.
I also update my mail workflow a little bit, so there is a small chance that I can miss your email in the next few days.