Hello DISmekalin,
Ah! So you have set your ESA to an open relay for the moment, this would really attribute into your reputation score getting lowered as being an open relay, spammers will exploit this.
Please change this RAT Default action to - Reject.
RAT Should only allow your internally hosted domains as accept.
If you need to create a setup for an external server to send emails outbound to other addresses that isn't your own.
If you are using 1 listener (which is what i'm suspecting).
Please go to GUI > Mail Policies > Mail Flow Policies
If you do not have a policy called "RELAYED" Please go ahead to create one.
Click Add Policy
Name: RELAYED
Connection Behavior : Choose "Relay"
Leave the rest as it is (default)
Scroll right down to the bottom and Submit.
After this is done.
Go to GUI > Mail Policies > HAT Overview
If you do not have a RELAYLIST then please click on.
"Add new Sendergroup"
Here you will have an option to input a name
Name it: RELAYLIST
Order: 1
Comment : Leave it blank
Policy : Select RELAYED from your drop down menu
Leave everything else blank and click Submit and Add Sender.
Now add the Mail server IP or hostname to allow this server to relay through your ESA without a RAT check.
Once this is done, submit and commit changes and test.
(If you are confused on where to get the mail-server hostname/IP, you can obtain this with message tracking GUI > Monitor > Message Tracking and find an email sent by this sender before.
Click on Show Details and look under Sending Host Summary, this is what you add to the RELAYLIST sendergroup)
I hope this helps, please let me know.
Regards,
Matthew
