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How does email flow within exchange 2010 RRS feed

  • Question

  • I need to have a better understanding how email flows within 2010.  I understand Hub handles all indside and outside mail, even if the mail is from one internal server to another internal server.  I like to know how does CAS server plays the role in email flow.

    thanks

     

     

    Wednesday, May 11, 2011 11:56 PM

Answers

  • If you have one AD site, and you have MBX servers and HUB servers in the same AD site, then mail will be picked up from the Outbox from Outlook and submitted to the transport server.  From here it will be routed to the ultimate destination (internal or external).

    Sukh

    • Marked as answer by AlanFil Monday, June 13, 2011 8:26 PM
    Thursday, May 12, 2011 6:21 PM
  • It depending on the services that run on the Client Access server

    Services Used by a Client Access Server


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
    • Marked as answer by AlanFil Friday, May 13, 2011 3:36 PM
    Friday, May 13, 2011 9:44 AM

All replies

  • Here is a diagram:

    http://www.microsoft.com/downloads/en/details.aspx?FamilyID=6eb8c09a-6ea4-442a-9faa-de33265ceb84&displaylang=en

    Detailed Info:

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

    Understanding Transport Pipeline
    The CAS role doesnt interact directly with message flow.
    Thursday, May 12, 2011 1:01 AM
  • Depending how detailed you want to know about how the CAS work but I would suggest get the Exchange 2010 Architecture Poster from the below link and go through it. If you want to know more than I would suggest the technet library link below.

    http://www.microsoft.com/downloads/en/details.aspx?familyid=cea0cf7e-d824-49bb-8924-39d66a5fb88e

    http://technet.microsoft.com/en-us/library/dd298114.aspx

     


    Thursday, May 12, 2011 1:01 AM
  • CAS handles non-MAPI clients such as OWA, POP, IMAP, etc. Fore more information, please see: http://technet.microsoft.com/en-us/library/bb125134%28EXCHG.140%29.aspx.
    Thursday, May 12, 2011 5:28 PM
  • thank you for your respond, but i have reviewd most of these links already.  I just need a simple description how mail flow within exchange 2010.  I understand in exch 2010, it also handles mapi connection.

    so if someone sends an email from one internal mailbox to another internal mailbox, does it go through CAS and then hub and reaches the other mail servier. OR does it hit the hub only? or does hit CAS only

    alan

    thanks

     

    Thursday, May 12, 2011 6:01 PM
  • If you have one AD site, and you have MBX servers and HUB servers in the same AD site, then mail will be picked up from the Outbox from Outlook and submitted to the transport server.  From here it will be routed to the ultimate destination (internal or external).

    Sukh

    • Marked as answer by AlanFil Monday, June 13, 2011 8:26 PM
    Thursday, May 12, 2011 6:21 PM
  • thank you for your respond, but i have reviewd most of these links already.  I just need a simple description how mail flow within exchange 2010.  I understand in exch 2010, it also handles mapi connection.

    so if someone sends an email from one internal mailbox to another internal mailbox, does it go through CAS and then hub and reaches the other mail servier. OR does it hit the hub only? or does hit CAS only

    alan

    thanks

     


    the CAS role is not part of the message flow in your scenario. Messages travel from MBX to Hub to MBX internally within the Exchange Org.

     

     

    Thursday, May 12, 2011 6:40 PM
  • The CAS server is more for owa,oab, pop3, imap4, activesync, GAL lookup and authentication. As for routing emails as mentioned by Sukh and Andy it's the hub transport task.
    Friday, May 13, 2011 3:08 AM
  • It depending on the services that run on the Client Access server

    Services Used by a Client Access Server


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
    • Marked as answer by AlanFil Friday, May 13, 2011 3:36 PM
    Friday, May 13, 2011 9:44 AM
  • CAS handles non-MAPI clients such as OWA, POP, IMAP, etc.

    The CAS server is more for owa,oab, pop3, imap4, activesync, GAL lookup and authentication.

    In Exchange 2010, CAS now handles all interaction between clients and their email, including mailbox access via Outlook (regular old Outlook as opposed to Outlook Anywhere). So MAPI too.

     


    Friday, May 13, 2011 2:05 PM