Some e-mail messages that are sent by Outlook 2003 users are not delivered after you enable the Sender Filtering feature in Exchange Server 2003, and message senders may receive a non-delivery report message (901160)

SYMPTOMS

Consider the following scenario. You enable the Sender Filtering feature on the Simple Mail Transfer Protocol (SMTP) virtual server in Microsoft Exchange Server 2003. After you enable the Sender Filtering feature, some messages that are sent by users of Microsoft Office Outlook 2003 are not delivered by the server that is running Exchange Server 2003. Message senders may receive a non-delivery report (NDR) message that includes an error message. The error message is similar to the following error message:

4.4.7 Dropping connection due to an error on this server.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

You must install Microsoft Exchange Server 2003 Service Pack 1 before you install the hotfix.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

836993 How to obtain the latest service packs for Exchange Server 2003

Restart requirement

You do not have to restart the computer after you install the hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

   Date         Time   Version            Size    File name
   -----------------------------------------------------------
   22-Jul-2005  01:46  6.5.7233.39       105,984  Turflist.dll

MORE INFORMATION

Messages that have a blank From field are not delivered in Exchange Server 2003 even when the following conditions are true:

The Filter messages with blank sender check box in Microsoft Exchange System Manager is not selected. The Filter messages with blank sender check box is located on the Sender Filtering tab in the Message Delivery properties under Global Settings.
The message has other valid originator fields, such as the following:
- Sender
- ResentFrom
- ResentSender

For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

817903 New naming schema for Exchange Server software update packages