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

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