Internal messages are routed through Exchange in a similar manner. The process for a mail user to send a message to another mail user in the organization or to the Internet is as follows:
- A message is created by a user in Outlook, on their Windows Mobile device, or onOWA where the user is connected to the Client Access server.
The message is stored on the user’s Mailbox server as an Outbox message and, likely,a copy is stored in the user’s Sent Items folder on the Mailbox server.
The Mailbox server then typically sends the message to a Hub Transport server thatperforms compliance content assessment and then looks at the internal routing formessages and forwards the message, directly to aMailbox server.
For internal messages, the Mailbox server places the incoming message into theuser’s mailbox and notifies the user that a message has arrived.
The message recipient launches Outlook, OWA, their Windows Mobile device, oranother client system and connects to the Client Access server. The Client Accessserver confirms the destination point of the user’s mailbox and provides the useraccess to their mailbox data.