This is a manual to change it:
Go to your Inbox.
Click on the New button in the upper left to start a new email.
Click on the Format Text tab at the top of your screen.
You’ll see the buttons are grayed out. Click in the big white box wher
+e you’d write the body of your email to activate them.
Click on the dialog box in the Paragraph group. The dialog box is loca
+ted in the lower right-hand corner of the group. It looks like a tiny
+ arrow inside a square.
In the section under “Spacing,” change the “Before” and “After” to zer
+o.
Change the Line Spacing to Single.
Click on the Default button at the bottom of the box.
Click OK in the box that pops up.
Click OK to get out of the Paragraph dialog box.
This i will do with Win32-OLE...