Microsoft KB Archive/811061

= XCCC: Exchange Clients Do Not Receive &quot;New Mail&quot; Notification Messages =

Article ID: 811061

Article Last Modified on 2/27/2007

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APPLIES TO


 * Microsoft Exchange 2000 Enterprise Server
 * Microsoft Exchange 2000 Server Standard Edition
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
Exchange 2000 Server clients may not receive a notification message when new mail arrives.



CAUSE
This behavior may occur when all the following conditions exist:
 * Exchange 2000 Server is installed on a cluster server.
 * The Exchange 2000 Server is behind a firewall.
 * The firewall is not configured to permit Internet Protocol (IP) traffic from the cluster node.

This behavior occurs because all mail traffic, both to and from the Exchange 2000 Server, is passed by using the Exchange 2000 Server virtual server IP address. However, when a new mail notification is sent, it comes from the cluster node IP address.



WORKAROUND
To work around this issue, reconfigure the firewall to permit outbound traffic from the IP address of the cluster node.

Note The client does not reply to this packet so there does not have to be two-way communication.



MORE INFORMATION
The Information Store process (Store.exe) sends a User Datagram Protocol (UDP) packet for new mail notifications. However, because the Store process does not run on an Exchange virtual server but on the cluster node, the UDP packet is sent from the IP address of that node. If you fail over the cluster node, the data and Exchange 2000 Server virtual server configuration are moved to the Store process that is running on the other cluster server node. New mail notifications are sent from the IP address of that second cluster node.

For additional information about a similar issue with the Message Transfer Agent on a cluster server, click the following article number to view the article in the Microsoft Knowledge Base:

251318 XCON: Message Transfer Agent Uses Node IP Address Instead of Cluster IP Address

Additional query words: popup dialog box notify blurb has arrived would you like to read it now

Keywords: kbemail kbclustering kbprb KB811061

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