I would never handle email myself. I would instead use a provider, turn off all filters and set up a mail server locally that works via the provider.
That way I don’t have to convince my ISP to set up a PTR for me, handle DMARC or SPF. Or care if my IP is blacklisted.
I should look into AWS as well. Currently using a refurbished Datto NAS, running debian with everything in docker. I also have a r710! But I don’t have room for it at the moment.