Hello.
I just found the following bounce detected by RBP as a HardBounce:
5.0.0 (undefined status) ||| smtp;550 5.7.606 Access denied, banned sending IP . To request removal from this list please visit https://sender.office.com/ and follow the directions. For more information please go to http://go.microsoft.com/fwlink/?LinkID=526655 (AS16012 ||| x.x.x.x ||| relayerror ||| access denied ||| policy-related
Correct me if I am wrong but in ...