It's only probably your domains already have enough reputations.
I don't think you understand the complexity of having your emails marked as spams on newer domains.
I've also been running my domain email for 15 years or so and configurations are easy but I still rely on external delivery services just so I get less chance of being flagged as spam.
I don't think you understand the complexity of having your emails marked as spams on newer domains.
I've also been running my domain email for 15 years or so and configurations are easy but I still rely on external delivery services just so I get less chance of being flagged as spam.