Paypal IPN Invaid for listing

Hi Support Team,

after testing add paid listings and deleting those I am getting now since 2 days the email system message that

Paypal IPN Invaid for listing ID: #294 Screen shot > http://screencast.com/t/rdHPcZi0R
Paypal IPN Invaid for listing ID: #295 Screen shot > http://screencast.com/t/du5c4d3w4w9

While I have done those tests within the paypal account settings there was the paypal ID [email protected] set as paypal sandbox settings > screen shot http://screencast.com/t/3zz1XBagF

I guess this setting is may a prefilled option from yours? If so, are you may able to delete the paid paypal subscriptions to stop the IPN INVALID messages.

If this was not your account, how am I able to stop the resubmitting of those IPN INVALID messages?

Looking forward to your help.

BR, Alex
Thanks, Alex