TheGrumpyDeveloper

This plugin allows users to host their own IPN listener on their wordpress install. It will connect to the email service via the API and allow the user to map a 
paypal button to an active campaign list. The pro version of the plugin will allow users to map multiple buttons to multiple lists. Currently just Active Campaign is supported but in the next version, will be adding Mailchimp and other popular providers.

Bridge – Paypal to Email Lists

This plugin allows users to map their paypal buttons to email campaign lists in Active Campaigns (and soon mailchimp and others)

nicolasoft

A plug-in that has the function of receiving an IPN from Paypal and sending the download link URL of the product file by e-mail when the customer completes the payment from the Paypal button placed on the product sales page

NICOLASOFT Digital Data Seller

Plug-in that supports sales of digital data using Paypal button

Bridge – Paypal to Email Lists vs NICOLASOFT Digital Data Seller