I run my own email server on own ip since 2005. Never had any issues with gmail or M$. Changed IP at least one time, no difference from the first day on. Just o

I run my own email server on own ip since 2005. Never had any issues with gmail or M$. Changed IP at least one time, no difference from the first day on. Just one time I had to activate SSL for inter server communication. But that was a known thing that gmail was rejecting you otherwise.