title: Paypal IPN failing with a Magento site and another different side - collisions
body: <p>Have a workign Magento 1.7 live site, its Paypal has been fine until recently when another site got attached to the PayPal account it uses. </p>
  
  <p>This other site does not use IPN (Magento site uses PayPal Website Standard payments). However, I think  it is that the other site triggers a IPN notification that goes to the default URL , which is of course set to the livesite's /paypal/ipn/ URL IPN listener. </p>
  
  <p>I have found this thread on a different site <a href="http://www.magentocommerce.com/boards/errors.php/viewthread/285840/" rel="nofollow">http://www.magentocommerce.com/boards/errors.php/viewthread/285840/</a> where some solutoins are given but it seems very inconclusive. What is the recommended way to fix this issue? </p>
  
  <p>1) write dummy script IPN to catch nonIPN Calls and respond with something
  2) turn off IPN in paypal account, since Magento may send its own ones anyway (?) 
  3) Other solution?</p>
  
  <p>thanks for any advice!</p>