Looking for Billing processor that..

[CalModels]

has the ability to send recurring invoices like Paypal does, but also accepts adult sites.

Not sure if there are any out there that give the ability to do this, but what I am looking for is a processor that can process one time payments, but also have the ability to email invoices for one time and recurring charges automatically, and then accept payment for those invoices.

Thanks for any input in advance.