This is very simple and effective mail helper. Original code is taken from Smarty's mailto plugin.
This helper scrambles your email addresses so those nasty web bots 'can not' harvest them.

In /lib/helper/MailEncodeHelper.php

<?php
function encode_mail($Address, $Caption=null)
{
  if ($Caption == null)
    $Caption = $Address;
 
  $string = 'document.write(\'<a href="mailto:'.$Address.'">'.$Caption.'</a>\');';
  $js_encode = '';
  for ($x=0; $x < strlen($string); $x++)
    $js_encode .= '%' . bin2hex($string[$x]);
 
  return '<script type="text/javascript">eval(unescape(\''.$js_encode.'\'))</script>';
}
?>

In template

<?php use_helper('MailEncode') ?>
 
My email: <?php echo encode_mail('info@example.com'); ?>  
or   
My email: <?php echo encode_mail('info@example.com', 'Damjan Malis'); ?>