When it somes to Joomla 1.5, sometimes having to create a feedback form is overkill, when all you really need is for a Contact to do a graceful redirect to a thank you page upon submission.
This hack requires modifying a core component, so be sure to save a copy of your original 🙂
The file to edit is:
Create your redirect page and have the URL for the redirect handy.
Look for the following code at line 193 in Joomla 1.5.10 (this is the version I was working on this week):
$msg = JText::_( 'Thank you for your e-mail');
$link = JRoute::_('index.php?option=com_contact&view=contact&id='.$contact->slug.'&catid='.$contact->catslug, false);
And replace it with this code:
$link = JRoute::_('redirect url goes here');
Replace the text redirect url goes here with the URL of your redirect page. Save and upload the revised controller.php file.