Email being delivered twice
Posted on 2006-06-07
I am supporting an environment of approximately 5 PCs who use Exchange Server 2003 for local email and calendar functions. Each PC is configured with a user account and password and mailbox so that people can send and receive local email to one another and share calendar's etc.
On each PC, using Outlook 2003, there has also been configured an internal email address for each person provided by our ISP. The reason that this is not hosted on the internal Exchange server is that the link tends to be a bit unreliable and we wanted to have all email sent to us from external parties to get to our ISP and sit there waiting for us to "pop" it down from them using the Outlook 2003 client rather than have it bounce if our email server was not available due to the link being down.
One of the staff members has a Blackberry device. As we do not want to invest in a Blackberry Enterprise server, I plan to use the Blackberry Desktop Redirector to attach itself to the Outlook 2003 client for this staff member so that all emails that come in (he has three setup) get forwarded to him Blackberry device. Another fly in the ointment however is the fact that this client uses a laptop, and as such his Outlook 2003 client that runs on this laptop is not always on and connected to the network and as a result mail sent to him does not forward to the Blackberry device when he takes his laptop with him.
To solve this, I installed second PC which remains in the office that does nothing but run WIndows XP Pro and Outlook 2003, and is configured with his email details. I installed the Blackberry Desktop Redirector on this with the view that even if he took his laptop with him, this PC would always be on and would forward his messages to his Blackberry.
Both of these Outlook clients are configured to deliver mail to his mailbox on the Exchange 2003 server.
My problem, however, is that now when his laptop and C with the same Outlook 2003 profile are both running, both POP mail from the ISP and deliver it to the Exchange 2003 mailbox for this user. The result? Both PC and laptop now receive the message twice - one because the PC is popping it and secondly because the laptop is popping it.
Is there a way I can prevent this so that the messages will overwrite each other if there are two the same instead of adding it to his Exchange mailbox on the server twice?