title: Validation error: PayPal IPN response from a different email address
body: <p>I've used plugins to set up my ticket sales. I'm testing my site in Sandbox mode and I'm receiving this error after going through the Paypal process (which is showing in sandbox mode):</p>
  
  <p>Validation error: PayPal IPN response from a different email address (sarah-facilitator@XXXXX). Order status changed from processing to on-hold.</p>
  
  <p>Paypal created the facilitator email for me and I'm using those details as well as the supplied sandbox API user/password/sig on my website</p>
  
  <p>As I'm in Australia, I've also set up my site to accept USD.</p>
  
  <p>I'm not sure what's happening that I'd get this error.</p>