XCON: Internet Mail Service Settings Are Not Overridden for Custom Recipients in Distribution List

If you are a custom recipient on a distribution list, and you enable the Override Internet Mail Service settings for this recipient option, when you receive a message, the Internet Mail Service settings are not overridden as expected; you receive the message in the format that is configured on the Internet Mail Service.

This issue occurs because the Imail component in the information store only checks the distribution list when it determines the message format. The Imail component is responsible for converting messages from Exchange Server database format to the proper Internet format.

To work around this issue, manually set the Encoding type that you want to use on the distribution list:

1. Open the Exchsrvr\Bin folder, and then run admin /r to start the Exchange Administrator program.
2. Click the distribution list that you want to modify, and then click Raw Properties on the File menu.
3. In the List Attributes of Type box, click All.
4. Find the Internet-Encoding attribute, and then enter one of the following values in the Edit Value box:
   
   
   Collapse this tableExpand this table

   Encoding Type	Value for Internet-Encoding
   Use the settings from the Internet Mail Service	1310720
   Multipurpose Internet Mail Extensions (MIME) with Plain Text	393216
   MIME with Hypertext Markup Language (HTML)	917504
   MIME with Plain Text and HTML	1441792
   Plain Text/uuencode	2228224
   Plain Text/uuencode with Binhex	131072

5. Click the Set button, and then click the OK button.