Good afternoon!
To change the font you would need to use the following:
Code:
.HTMLBody = "bFONT size='5'UNCLASSIFIED/FONT/b"
instead of using .Body = "UNCLASSIFIED".
.Body opens up a plain text e-mail. When you use .HTMLBody you can incorporate HTML tags such as b for Bold and FONT to determine the size.
Hope this help!