Found my notes on this....
A link posted from mailop mailing on what one of the admins felt was best practices (long list of things)
Ref: https://bridge.grumpy-troll.org/2020/07 ... erver-bcp/
from the same mailing list, someone from microsoft pointed to this document and what your options are when dealing with them:
https://sendersupport.olc.protection.ou ... oting.aspx
Good luck.
Jim