Edit the template with the template editor. remove just the body parts of the templates.

Control Panel » Templates
Select "email_html.tpl" and click "Edit Selected Template"

FIND this
Code
		<tr>
			<td {$styletdbody}>
				{$posts[ind].body}
				<br />
			</td>
		</tr>

Remove it.

The procedure is basically the same for the other email templates, but that is the one that 99.9% of your users will be getting.

Dont forget to create a backup before making any changes.

current developer of UBB.threads php forum software
current release: UBB.threads 8.0.1 // wip: UBB.threads 8.1.0
isaac @ id242.com // my forum @ CelicaHobby.com