How to implement DMARC/DKIM in Exchange 2010 Server

Question

What are the steps to setup DMARC on on-premise Exchange 2010?

Answer 1

There is nothing native in Exchange 2010 to do this.

You will need to install a third party add-in or send your outbound mail through a third party or Microsoft ATP/EOP to do this.

Since Exchange 2010 is out of support, your best option os to send outbound mail through a 3rd party gateway that support DKIM/DMARC

Answer 2

NIce answer here https://learn.microsoft.com/en-us/answers/questions/620844/how-to-implement-dmarcdkim-in-exchange-2010-server.html hope it helps !