Comment by neop1x

I have similar setup but use Exim instead of Postfix. And I am still glad I host my own services. Yes, it took time but it will work as I want it forever. Only lazy people prefer ready-made cloud services - yes, it's convenient - but it's more costly, you lose control over your data and they are constantly redesigning and reinventing something. You never know when they sell the business or increase prices, ban or limit you.