Paypal: how to disable notifications

Hello,
every time a new order is placed through Paypal I receive a notification with the subject
"Paypal payment notification: payment completed for order XXX"

it's a simple html email with no template, as far as I see it's not in in the "emails" list
which I can manually disable in Hikashop configs

I guess this is coming directly form the paypal payment plugin, infact I have "allow notification" set to yes there

but in your documentation you say to let that setting on "yes" (see nimb.ws/HEvnKf )
otherwise Paypal won't autoconfirm orders that ave been paid

Allow payment notifications from PayPal : That option should stay on unless you don't want that PayPal confirms automatically the orders on your website so that you can do it manually yourself.

So is there a way to turn off this kind of notifications without affecting the auto-confirmation of paid orders?
I am already receiving orders notifications form Hikashop,
and I'd like to keep emails to administrators as low as possible to avoid confusion

thank you