The current update corrects the "Return-path" header in the notification emails with the download links. In many websites that send the emails with PHPMailer, Apache inserts a different email address in the "Return-path" header, this provokes that the emails be classified as spam.

git-svn-id: https://plugins.svn.wordpress.org/sell-downloads/trunk@1013951 b8457f37-d9ea-0310-8a92-e5e31aec5664