Controlling your domain/mx is the most valuable thing. Email reception has not been a problem for me so I enjoy having my mx pointing to my own mail server. It

Controlling your domain/mx is the most valuable thing. Email reception has not been a problem for me so I enjoy having my mx pointing to my own mail server. It gives me more control and it requires very little maintenance. If I was going to outsource anything the first choice would be outbound. My email system does everything right for reputation protection. All senders are authenticated on secure connections and the senders are people I trust. Nothing bad gets sent and my static IP is on a reputable server host and is not on any public black lists. I maintain SPF, DKIM etc. If someone decides to block my IP for no reason by accident or on purpose there is very little I can do or care to do anymore. I have an alternate path for emails setup via a server I host elsewhere ready to go. If I run into a widespread delivery issue due to massive indiscriminate ip blacklisting of my provider I can enable it. That has happened once in 20 years. If delivery gets too hard I will change that policy to send all outgoing emails through a commercial smtp delivery service and let them deal with the problems.