You receive an NDR for all recipients when you send an e-mail message to a personal distribution list in Exchange 2000 Server

When you send an e-mail message to a Microsoft Outlook personal distribution list, you receive a non-delivery report (NDR) that includes all the distribution list members. The NDR appears similar to the following message but with one entry per member of your personal distribution list:

This problem occurs when your personal distribution list contains an invalid e-mail address that either contains one or more spaces after the at sign (@) or contains no domain name after the at sign (@). If an e-mail address in the personal distribution list contains spaces or no domain name after the at sign, the e-mail address causes the Microsoft Exchange 2000 Server transport to generate an NDR that includes all the recipients, including valid recipients of the e-mail message.

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

The English version of this hotfix has the file attributes (or later) 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.
Note Because of file dependencies, this update requires Exchange 2000 Server Service Pack 3 (SP3). For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.

For additional information about NDR error codes, click the following article number to view the article in the Microsoft Knowledge Base: For more information about the Simple Mail Transfer Protocol (SMTP) specification, visit the following Web site: For additional information, click the following article number to view the article in the Microsoft Knowledge Base: