Microsoft Exchange Hangs Sending Message Using SPX

Microsoft Exchange or Windows Messaging may stop responding (hang) when you try to transmit a message using SPX over a dial-up connection.

This problem occurs only if the installed version of NWLINK is dated before 6/27/96 and the Wsipx.vxd file is dated before 3/5/97.

This problem occurs only when Microsoft Exchange or Windows Messaging is started offline and you use the Deliver Now command to deliver messages over a dial-up connection.

The problem occurs because WSIPX submits a larger frame than is supported. SPX checks the NDIS packet frame size against the connection's maximum frame size and hangs or returns a "The message cannot be delivered" error message. The NDIS packet frame size is 1497 bytes and the maximum frame size is 1160 bytes.

This problem no longer occurs in Windows 98. To resolve this problem, install the current version of Windows. For information about the current version of Windows, visit http://www.microsoft.com/windows (http://www.microsoft.com/windows) .