<p>You can use following variables in your template:</p>
<p><strong>$[email]</strong>&nbsp;: Sender email address<br /><strong>$[datetime]</strong>&nbsp;: Time of this message sent<br /><span><strong>$[product_name]</strong><span>&nbsp;: Out of stock product name</span></span><br /><span><strong>$[site_name]</strong><span>&nbsp;: Your website name</span></span></p>