Outlook e-mail message format overrides the Internet message format that is specified by your Exchange Server 2003 computer

When you send an e-mail message from a Microsoft Outlook client to the Internet through a Microsoft Exchange Server 2003 computer, the original Outlook message format overrides the Internet message format that is specified by your Exchange Server computer.

Note To view the Internet message format settings on your Exchange Server computer, start Exchange System Manager, expand Global Settings, click Internet Message Formats, and then double-click Default.

This problem occurs because Outlook sets the PR_INETMAIL_OVERRIDE_FORMAT flag on all HTML e-mail messages. The flag prevents the Exchange Server computer from overriding the original message format of the e-mail message.

Service pack information

To resolve this problem, obtain the latest service pack for Exchange Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Hotfix information

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. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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.

Prerequisites

To install this hotfix, you must have Exchange Server 2003 Service Pack 1 (SP1) installed.

Restart requirement

You do not have to restart your computer to install this hotfix. However, the following Exchange and Microsoft Internet and Information Services (IIS) services are automatically restarted when you install this hotfix:

• World Wide Web Publishing Service
• Simple Mail Transport Protocol (SMTP)
• Microsoft Exchange Routing Engine
• Microsoft Exchange POP3
• Microsoft Exchange IMAP4
• IIS Admin Service

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 item in Control Panel.

Hotfix installation instructions

After you install this hotfix, you must configure a registry entry to enable the hotfix. To do this, follow these steps.

Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeTransport\Parameters
   Note If the Parameters subkey does not exist, follow these steps:
   1. Right-click MSExchangeTransport, point to New, and then click Key.
   2. Type Parameters as the subkey name, and then press ENTER.
3. On the Edit menu, point to New, and then click DWORD Value.
4. Type DisableInetOverride as the entry name, and then press ENTER.
5. Right-click DisableInetOverride, and then click Modify.
6. In the Value data box, type a value of 1, and then click OK.
7. Quit Registry Editor.
8. Restart the Simple Mail Transport Protocol (SMTP) service. To do this, follow these steps:
   1. Click Start, click Run, type services.msc, and then click OK.
   2. Right-click Simple Mail Transport Protocol (SMTP), and then click Restart.

If the DisableInetOverride entry is set to 0 or does not exist, the Outlook e-mail message format settings are used.

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

This problem was first corrected in Exchange Server 2003 Service Pack 2.

This problem does not affect Microsoft Outlook Web Access clients. E-mail messages that are created by using Outlook Web Access are formatted as expected. These e-mail messages use the Internet message format settings on the Exchange Server computer.

For additional information about how to configure Internet e-mail message formats, click the following article number to view the article in the Microsoft Knowledge Base: For additional information about a client-side resolution for this problem if you use Microsoft Outlook 2002, click the following article number to view the article in the Microsoft Knowledge Base: For additional information about Microsoft software updates, click the following article number to view the article in the Microsoft Knowledge Base: