Forum Discussion
Exchange Hybrid centralized email flow bypass issue
We have deployed the Exchange hybrid scenario where all emails received from Internet get filtered through an on-premises Spam appliance. MX records are pointing to on-premises Spam appliance so the...
I did not get a chance to test the change but please take a look at this link that provides a different solution for exactly the same scenario https://o365info.com/configure-exchange-online-inbound-mail-flow-to-accept-smtp-connection-only-from-a-specific-mail-security-gateway-ip-address/
Ok but remember connectors are cumulative, all you are doing here is adding additional ways to receive and not restricting anything as per your original question.
You need to do something with the original connector that is accepting internet mail.