If you have Outlook 2000 or later, you can make a registry change to
substitute your custom form for the default form. See
http://www.outlookcode.com/d/newdefaultform.htm#changedefault . Note that it
doesn't work completely for message forms in Outlook 2003.
However, that's probably not the solution to your problem. If you're using
Word as your email editor, try changing the paragraph spacing in the Format
menu.

Signature
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> Is there any way I can make a custom message form my
> default message form? When I've made the change I want, I
[quoted text clipped - 8 lines]
> a way to simply change this on the default message and
> make it the default style for the message?