DOCUMENT:Q230283  16-MAY-2002  [exchange]
TITLE   :XADM: Extension SMTP Could Not Be Loaded
PRODUCT :Microsoft Exchange
PROD/VER:winnt:4.0,5.0,5.5
OPER/SYS:
KEYWORDS:exc4 exc5 exc55

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The information in this article applies to:

 - Microsoft Exchange Server, versions 4.0, 5.0, 5.5 
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SYMPTOMS
========

When you open the properties for the Internet Mail Service in the Exchange
Server Administrator program, the following error message is displayed:

   Extension SMTP Could Not Be Loaded.

The SMTP extension is located in the computer share \\ExchangeServer\Add-ins and
is required for the Internet Mail Service to start. When you attempt to access
this extension, you cannot, and the following secondary error message is
displayed:

   Not enough server storage is available to process this command.

CAUSE
=====

When you access shares on a computer running Windows NT Server from a Windows NT
client and the IRPstackSize parameter is set too low on the server, the error
message in the "Symptoms" section of this article may be displayed (not enough
server storage is available to process this command).

RESOLUTION
==========

For additional information about how to correct the IRPstackSize, or for
information about a fix that corrects this problem, click the article number
below to view the article in the Microsoft Knowledge Base:

   Q198386 Changes in IRP Stack Size in Lanman Server


STATUS
======

Microsoft has confirmed this to be a problem in Windows NT 4.0 and Windows NT
Server 4.0, Terminal Server Edition.

Additional query words:

======================================================================
Keywords          : exc4 exc5 exc55 
Technology        : kbExchangeSearch kbExchange500 kbExchange550 kbExchange400 kbZNotKeyword2
Version           : winnt:4.0,5.0,5.5
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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