7.23. Controlling Global and Internet Message Format Settings
Problem
You need to associate MIME types with specific extensions, define default message format settings, or adjust them on a per-domain basis, throughout your Exchange organization.
Solution
Using a graphical user interface
To add a new MIME types association to a specific extension, do the following:
Open the Exchange System Manager (Exchange System Manager.msc).
Expand Global Settings, right-click Internet Message Formats, and click Properties.
Click Add. In the Type field, enter the MIME content type. In the Associated Extension field, enter the extension. Click OK.
Click OK.
Setting message format settings on a per-domain basis, do the following:
Open the Exchange System Manager (Exchange System Manager.msc).
Expand Global Settings and click Internet Message Formats. You will see a listing of the current domains (* is the default) that have specific format settings in place.
If you wish to create a new domain-specific setting, right-click Internet Message Formats and click New Domain. Fill in the name and the SMTP domain and click OK.
From the list of domains, right-click the domain to modify and click Properties.
Click the Message Format tab and select the message encoding and character set options you wish to use.
Click the Advanced tab and configured the rich-text formatting, wrapping, and autoresponse options you wish to use.
Click OK.
Discussion
Global format options are shared throughout the Exchange organization, meaning ...