Stop a paypal notification being refused?

Hi,

I am testing processing orders through Hikashop using Paypal as the payment. Everytime I place an order I receive the following email:

Hello,
A Paypal notification was refused because the IP 66.211.170.66 is not in the list of valid IPs :
173.0.84.*
173.0.88.*
173.0.81.*
173.0.82.*

The buyer does not appear to see this, but is it a problem that I can stop? And if I can how?

Many Thanks

Hello,

You'll probably find your answer there :

Just remove all the IPs in that option and it will work.
The IPs filtering is not necessary as there is an IPN confirmation.

It seems that PayPal added some IPs lately but that the IPs were not added in the DNS entries.