by Jason Caldwell » June 13th, 2011, 11:23 pm
So sorry for the delayed response.
~ thanks for bringing this to my attention Cristián.
Yes, this is something you would need to seek assistance with, from a third party. There are currently no immediate plans to support QuickBooks Merchant Services from our end. However, a good developer should be able to use s2Member's Proxy IPN URL, with the instructions provided in your Dashboard. Please see: Dashboard -> s2Member -> PayPal Options -> IPN Integration -> Proxy IPN Key. I recommend s2Member's Proxy IPN URL as the easiest way to integrate other unsupported Payment Gateways.