I think the parent is perhaps just lucky. A reason given for mail not getting to Microsoft servers was that a server IP controlled by the same hosting company had in the past been on a blacklist.

I was happy to move hosts to one that was considered trusted, but there was no way for me to know the IPv4 addresses the company had in the past, never mind if they'd been on a pertinent blacklist at some time.

Based on that I think it could work, but there are no guarantees that outside, historical characteristics won't screw things up for you.