I’m moving away from google etc.

I’m hosting Nextcloud through hetzner, but I need a Mail Host, I’ve looked at a few options but haven’t really found anything great.

I don’t want to be locked into a vendor again, so ideally I want something where if I want I could easily move.

I might just go with Hetzner but is their spam filtering, calendars etc. good? (I eventually want to move my whole family over, so it needs to be solid and reliable)

Any recommendations/suggestions?