SEO on your back about newsletter conversions? Don’t want to install pointless extensions? Want to redirect to a newletter thank you page?

Here we go:

Find your newsletter subscription form.

Most commonly app\design\frontend\fat\default\template\newsletter\subscribe.phtml

Pop this in before the end:

<input type="hidden" name="uenc" value="<?php echo Mage::helper('core')->urlEncode(Mage::app()->getStore()->getBaseUrl() . 'your_page_url_key') ?>"/>

Remembering to replace ‘your_page_url_key’ with your desired page.