error REMOTE ADDRESS: 173.0.81.1 and others

[francota]

joomla 343
VM 309

Hello after reading a post on this forum, i understand some errore in my configuration, example I used different email from paypal.
BUt i have still some problem and i have error in the file log paypal.2.log.php:

2015-07-14 20:27:08 DEBUG checkPaypalIps REMOTE ADDRESS: 173.0.81.1
2015-07-14 20:27:08 ERROR validateIpnContent: Invalid IPN validation: NO ANSWER FROM PAYPAL
2015-07-14 20:27:08 DEBUG validateIpnContent: valid_ipn:

Any help

Thanks
Frank