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7. The BlackBerry device sends a delivery confirmation to the BlackBerry Dispatcher. The BlackBerry Dispatcher sends
the delivery confirmation to the BlackBerry Messaging Agent.
If the BlackBerry Messaging Agent does not receive a delivery confirmation within four hours, it sends the message to
the wireless network again.
The delivery confirmation verifies that the wireless network delivered the message to the BlackBerry device, but it does
not verify that the user received or opened the message.
8. The BlackBerry device decrypts and decompresses the message so that the user can view it, and notifies the user that
the message arrived.
Process flow: Sending a message from a BlackBerry
device
This process flow applies to new messages, reconciled messages (messages that a user moved, deleted, or marked as read
or unread), and wireless calendar entries.
1. A user sends a message from a BlackBerry device.
The BlackBerry device assigns a RefId to the message. If the message is a meeting invitation or calendar entry, the
BlackBerry device appends the calendar information to the message. The BlackBerry device compresses and encrypts
the message, and sends the message to the wireless network over port 3101, or over port 4101 if the BlackBerry device
is a
Wi-Fi enabled BlackBerry device that is connected to the enterprise Wi-Fi network.
2. The wireless network sends the message to the BlackBerry Enterprise Server.
The BlackBerry Enterprise Server accepts only encrypted messages from the BlackBerry device.
3. The BlackBerry Dispatcher uses the device transport key of the BlackBerry device to decrypt and decompress the
message.
If the BlackBerry Dispatcher cannot decrypt the message using the device transport key, the BlackBerry Enterprise
Server ignores the message and sends an error message to the BlackBerry device.
4. The BlackBerry Messaging Agent sends the message to the user’s email application.
5. The BlackBerry Messaging Agent sends a copy of the message to the Sent Items view in the user’s email application.
6. The messaging server delivers the message to the recipients.
Feature and Technical Overview BlackBerry Enterprise Server process flows
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