Please I have in my network 2 domains each one with his MX , and I have one esa , my problem is that mails that are sent from domain 1 are considered incoming ?
They should only be considered incoming if they are hitting a public listener. you should have 2 listeners set up, one public (external coming in) and one private (internal going out).
This will hit the content filters based on incoming outgoing.
You can, we have 6 listeners, you do need to do different port for each though. Your incoming should be port 25 as you have no control externally, internal private listener you should be able to set it on your internal mail to send on. We use 2525 2526 etc.
if your deployment is with one listener, you can add the secondary MX host IP or hostname to the RELAY list Sender Group which points to Mail Flow Policy with 'Relay' behavior under HAT table.
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