SYMPTOMS
There are two known problems with Exchange 95 clients transmitting messages
using SPX over dialup connections. The second problem will not be seen until
the first is resolved.
The first problem encountered appears as the following error in Windows 95:
An exception 0E has occurred at 0028:c00175e6 in VxD NWLINK(01) + 0000438A.
This was called from 0028:c0017014 in VxD NWLINK(01) + 00003db8. It may
be possible to continue normally.
Nwlink.vxd is accepting packets larger than max frame size. The exception
causes the machine to hang. For more information, please see the following
article in the Microsoft Knowledge Base:
164474
OE Exception in NWLINK Sending Message from Microsoft Exchange
The second problem:
The real problem is exposed once the Nwlink.vxd problem is remedied. The
Microsoft Exchange Windows 95 client will hang when attempting to transmit
a packet greater than 1160 bytes over a dialup connection using SPX.
This occurs because Wsipx.vxd submits a larger frame than is supported.
SPX checks the max NDIS packet frame size against the max frame size for
the connection and fails. NDIS packet frame size is 1497 bytes and max
frame is 1160. For more information, please see the following article in the
Microsoft Knowledge Base:
163378
Microsoft Exchange Hangs Sending Message Using SPX