𝚜𝚎𝚕𝚎𝚊 
Nothing really beat hosting my own emailserver,
@selea sorry to disappoint you, but your whole IP range can be blacklisted. So even if you don’t do anything wrong, if someone in your IP space sends spam, your IP still gets blocked.
I am fully aware of that, and that is why I route emails out via clean IP-ranges, and I am able to switch easy peasy.
@selea Can I ask what you went with for alternate routing? My hosted subnet just got got the stick by outlook.com (but not 365 business for some reason) and I really don't want to call MS again.
I went with a private relay on a trusted ISP basically :)
And with some special routes for specifics addresses, I wont need to be worried to get blacklisted again - ever.