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Mail Routing from Exchange 2010 to Exchange Server 2016 – Mail flow Migration

In the previous post we have seen Mailbox Migration from Exchange 2010 to 2016.


Now we need to change the SMTP (Simple Network Transfer Protocol) from Old Exchange 2010 to New Server Exchange 2016.


1: Change the SMTP port redirection on your Firewall or your Router.

2: Swapping the IP Address from the Old Server to New Server.

3: In Case if you have any Anti Spam devices or Email Scanners then you need to change the IP Address point to New Exchange 2016 Server.


Changing the Mail flow routing to New Server Exchange 2016 from Exchange 2010.


Login to EAC (Exchange Admin Center).

Click Mail Flow

Click Send Connectors Tab.

Select the Send Connector and Click Edit as shown below:




Under general I’ve Selected “Verbose” for protocol logging. And changed the Maximum message send size to 100. This can be changed based on your Business requirement.




Click Scoping

DO NOT Change the Address Space.

Here in my scenario Source Server is Exchange 2010 as shown below:




Click Add+” and Select the New Server “Exch2016“.




Click ADD -> Click OK




Now Select the Old Server “Exch2010” that needs to be REMOVED.

Select the Server and Click “-” to REMOVE ¬†as shown below:




Click Save.

Great we have seen Routing the Mail flow from Old Server “Exchange 2010” to New Server “Exchange 2016”.



Now Go ahead and test the mail flow


Praveen Kumar

MCTS, MCITP | Exchange Server

Publisher @ Techrid.com

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