A hotfix adds an option to let you disable the encoding of the subject line in the BizTalk Server 2010 SMTP adapter

Cumulative update information

The hotfix that resolves this issue is included in cumulative update package 2 for BizTalk Server 2010.

For more information about how to obtain the cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:

2573000 Cumulative update package 2 for BizTalk Server 2010

Registry information

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 How to back up and restore the registry in WindowsTo apply this hotfix, you must create the DisableSMTPSubjectEncoding registry key, and then set the DWORD value to 1 or to a value that is greater than 1 value. To do this, follow these steps:

1. Open Registry Editor. To open Registry Editor, click Start, type regedit in the Start Search box, and then press ENTER.

2. Locate and then click the following registry subkey on an x86-based computer:
   

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\BizTalk Server\3.0\Administration

3. Click the appropriate registry subkey, depending on the following conditions:

   • If SMTP send ports are handled by a 32-bit host instance of BizTalk Server 2010, click the following registry subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\BizTalk Server\3.0\Administration

   • If SMTP send ports are handled by a 64-bit host instance of BizTalk Server 2010, click the following registry subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\BizTalk Server\3.0\Administration

4. On the Edit menu, point to New, and then click DWORD Value.

5. Type DisableSMTPSubjectEncoding, and then press ENTER.

6. Right-click DisableSMTPSubjectEncoding, click Modify.

7. In the Value data box, type a value that is equal to or greater than 1, and then click OK.
   
   Notes

   • If you type a value that is equal to or greater than 1, the subject line of the email message is not encoded.

   • If you type 0, the subject line of the email message is encoded.

8. Exit Registry Editor.

9. Restart the host instances of BizTalk Server 2010.