Hi
In your /includes/templates/Your_TEMPLATE/templates/tpl_contact_us_default.php
if you have a line (round about line 17)
Code:
<?php echo zen_draw_form('contact_us', zen_href_link(FILENAME_CONTACT_US, 'action=send')); ?>
you should change it to
Code:
<?php echo zen_draw_form('contact_us', zen_href_link(FILENAME_CONTACT_US, 'action=send','SSL')); ?>
Regards