Exchange Server Mail Flow diagrams

Exchange server Mail Flow diagrams from Exchange server 2003 to 2013 and Office 365 Hybrid.

Exchange 2003

http://technet.microsoft.com/en-us/library/bb123864%28v=exchg.65%29.aspx

Exchange 2007

http://www.microsoft.com/en-us/download/details.aspx?id=13117

Exchange 2010

Complete : http://www.microsoft.com/en-us/download/details.aspx?id=21987

 

HT Components 2007/2010

http://technet.microsoft.com/en-us/library/aa996349.aspx

 

Exchange 2013

http://technet.microsoft.com/en-us/library/aa996349%28v=exchg.150%29.aspx

Office 365 Hybrid Mailflow

http://technet.microsoft.com/en-us/library/jj200581%28v=exchg.150%29.aspx

Also read the below article "Manage mail flow with mailboxes in multiple locations (Office 365 and on-prem)" to know more on Exchange Hybrid Deployment Mailflow

https://technet.microsoft.com/en-us/library/mt491268%28v=exchg.150%29.aspx

Exchange Server 2016 

Transport pipeline

https://technet.microsoft.com/en-us/library/aa996349(v=exchg.160).aspx

Exchange Server 2019

Exchange Server 2019 follows the same Transport pipeline architecture as Exchange Server 2016

Access the documentation here: Mail flow and the transport pipeline

Next Version of Exchange Server 

Microsoft team announced next version of Exchange Server will be released in the second half of 2025, will publish the updated Mail flow Architecture once released.

Know more: Exchange Server Roadmap Update

Refer Poster Section on the Blog to get complete Architecture posters and more.