Block port 25, except for mail server on Edgewater 4550 Router

Hi!

My company's network has been compromised with a bot that is sending spam.  We have been blacklisted now.  One of the most common solutions is to block port 25 from the router except for the mail server.

I believe I need to create an ACL for this rule.

I logged into the router but not sure where to go to enter the rules.  Any guiding would be greatly appreciated.
Router.JPG
jeannette_81Asked:
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KimputerCommented:
As the official websites has no documents (except for simple guides), and most screenshots of this router showing a Firewall in the main menu, for you I'm guessing it's under Security. New screenshot after you click that?
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jeannette_81Author Commented:
Thanks for the information.
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