XFOR: IIS 4.0 SMTP Does Not Retry Delivery on HELO/EHLO Failures

ID: Q194787

The information in this article applies to:

Microsoft Internet Information Server version 4.0
Microsoft Windows NT Server version 4.0, Terminal Server Edition

SYMPTOMS

The SMTP service included with Internet Information Server 4.0 rejects messages when the HELO or EHLO command times out. When the SMTP service tries to deliver a message and times out while waiting for the response to the HELO or EHLO command, an NDR is generated and no further retries are attempted.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, please see the following article in the Microsoft Knowledge Base:

Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack

STATUS

Microsoft has confirmed this to be a problem in Microsoft Internet Information Server (IIS) version 4.0. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

Keywords : NT4SP4Fix
Version : WINNT:4.0
Platform : winnt
Issue type : kbbug