Exchange inbound firewall for Exchange Hybrid

Marcus Wong Theen Nam 1,086 Reputation points

I have exchange hybrid environment and currently the mailflow (MX) point to the on-premise email gateway.

I would like to configure firewall between exchange on-premise and online for mailflow to work. Should I allow firewall port 25 incoming from EOP to Exchange server or to the email gateway will do?


Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
6,510 questions
Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
1,417 questions
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  1. Andy David - MVP 121K Reputation points MVP

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