I've used migadu and worked really well. I also have some domains using lunanode - great deal if you have other vps with them but have subjectively experienced

I've used migadu and worked really well. I also have some domains using lunanode - great deal if you have other vps with them but have subjectively experienced more downtime. Migadu just added master password support so can now dsync easily with another dovecot server (ie backups, move, etc). My next config will probably be migadu + selfhosted vps.