XCON: Messages In RAS Connector Queue NDR when Modem is Busy

• Microsoft Exchange Server, version 4.0

SYMPTOMS

When you send a message over the Microsoft Exchange Dynamic Remote Access Service (RAS) Connector, you might receive a Non-Delivery Report (NDR) after a specific period of time. The NDR will look like this:

   The following recipient(s) could not be reached:

         'TO USER' on 6/14/96 1:35:13 PM
               The recipient could not be processed due to congestion in
               the message transfer service
               [MSEXCH:MSExchangeMTA:EXCHANGE:MAIL1]

MORE INFORMATION

The Microsoft Exchange Message Transfer Agent (MTA) will try to send the message over the current RAS connection and this will fail. It will keep trying until the retry value set on the MTA override page for the RAS Connector has been exhausted. At this time, the MTA will send an NDR to you. This is by design.

WORKAROUND

There two ways to avoid this problem:

1. Schedule the Dynamic RAS Connector to dial out at predetermined time

       when the modem will be available.
   

2. Install another modem on the server. In the phone book entry for the Dynamic RAS connector, specify the new modem port or any available modem port.