XADM: Extension SMTP Could Not Be Loaded

ID: Q230283

The information in this article applies to:

Microsoft Exchange Server, versions 4.0, 5.0, 5.5

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
Version : winnt:4.0,5.0,5.5
Platform : winnt
Issue type : kbbug