Show message when no DKIM signature found

www/index.php

@@ -119,6 +119,9 @@ nav a {
 
 	<footer>
 		<ol>
+		<?php if (empty($signatures)): ?>
+			<li value="0">No signatures found</a>
+		<?php else: ?>
 		<?php foreach($signatures as $sig): ?>
 
 			<li><ul>
@@ -129,6 +132,7 @@ nav a {
 
 			</ul></li>
 		<?php endforeach; ?>
+		<?php endif; ?>
 
 		</ol>
 	</footer>