XCON: Messages In RAS Connector Queue NDR when Modem is Busy (152666)
The information in this article applies to:
- Microsoft Exchange Server 4.0
- Microsoft Exchange Server 5.0
- Microsoft Exchange Server 5.5
This article was previously published under Q152666 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]
This can happen if the modem on the RAS server is in use by another RAS
connection.
WORKAROUND
There two ways to avoid this problem:
- Schedule the Dynamic RAS Connector to dial out at predetermined time
when the modem will be available.
- 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.
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.
| Modification Type: | Minor | Last Reviewed: | 4/28/2005 |
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| Keywords: | kbprb kbusage KB152666 |
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