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Old 11-12-2007, 02:33 AM   #1 (permalink)
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Can anyone explain (with Diagram) if possible mail flow in a BES Exchange Enviroment? Much appreciated
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Old 11-12-2007, 03:08 AM   #2 (permalink)
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I found this Mail Flow for Dummies somewhere on this forum and copied/pasted it for my boss who was equally curious. Apologies to its originator but i can't seem to locate the original thread for acknowledgement.

Message flow to a handheld
  1. New Message arrives: the Microsoft/Lotus message transfer agent delivers message to userxxx8217;s desktop email mailbox.
  2. Message notification: Blackberry maintains a MAPI connection to the userxxx8217;s mailbox. The connection enables the server to use the same notification for new mail, blackberry processes message as it arrives.
  3. Message filters are applied: BES checks message fields against global filter rules.BES then applies user-defined filters.
  4. Message ID is assigned: BES randomly generates a reference id and tag.
  5. Message is compressed and encrypted.
  6. Message sent to wireless network: BES sends the first portion of the message through port 3101 to the wireless network, which verifies the PIN belongs to a valid handheld registered on the network
  7. Confirmation is returned: The network locates the handheld and delivers the message.
  8. Arrives on handheld: The handheld decrypts and decompresses the message and notifies the user of new mail.

Message flow from the handheld
  1. Message sent from handheld, on the handheld the message is assigned a reference id.
  2. Message is compressed and encrypted.
  3. Message is sent to BES Server, through port 3101 to the wireless network to the Blackberry Server.
  4. Message is decrypted and decompressed: BES decrypts and decompresses the message. If the message does not match the users encryption key, the message is discarded.
  5. Message is placed in outbox on the Exchange Store.
  6. Message delivery: The Exchange MTA delivers the message.
  7. Copied to sent items folder: A copy of the message is placed in the userxxx8217;s desktop email program sent items folder.

I am sure someone will correct the above if needed and may well have a cute diagram to go with it.

Edit
Found the posting by jsconyers.

Forum post here
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Last edited by DavidAdams : 11-12-2007 at 03:39 AM.
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Old 11-12-2007, 04:32 AM   #3 (permalink)
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thank you..much appreciated
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