Article: Q105289
Product(s): Microsoft Mail For PC Networks
Version(s): MS-DOS:3.0
Operating System(s):
Keyword(s):
Last Modified: 05-NOV-1999
-------------------------------------------------------------------------------
The information in this article applies to:
- Microsoft Mail Gateway to SMTP, version 3.0
-------------------------------------------------------------------------------
SUMMARY
=======
SYMPTOMS
========
The Microsoft Mail Gateway to SMTP may hang during message transmission when
using Novell's TCP/IP product for the PC (LAN Workplace for DOS). This error
appears:
ERROR write: (9) Bad file number
The following lines appear in the log file as errors when you use the -CD and
-LACSY options with SMTPGATE. (NOTE: Each error appears on one on one long line
in the log file; they are broken here due to formatting restrictions.)
[rx] 451 net hang reading from SMTP_GATEWAY_MACHINE: Connection timed out
during HELO with SMTPSMART_HOST.
14:34:25 - ERROR Invalid response to MAIL: 451 net hang reading from
SMTP_GATEWAY_MACHINE: Connection timed out during HELO with
SMTP_ROUTER/HOST_MACHINE.
CAUSE
=====
The way LAN Workplace for DOS handles IP fragmentation causes the SMTP Gateway
layer to hang because it is waiting for a good packet of information to process
and has no time-out limit for waiting.
RESOLUTION
==========
To avoid this problem, either:
- Upgrade to the latest version of LAN Workplace for DOS and apply all the
necessary patches.
-or-
- Configure LAN Workplace for DOS to use the smallest packet size available:
632. The default size is 2048.
Additional query words: 3.00 ErrMsg ERROR write: (9) Bad file number
======================================================================
Keywords :
Technology : kbMailSearch kbMailGateSearch kbZNotKeyword3 kbMailGateSMTP300
Version : MS-DOS:3.0
=============================================================================