EDD is a full-featured digital eCommerce plugin. Even for free downloads, you can force users to provide an email at checkout.
Now go lock that first file and start growing your subscribers! Have you tried any of these plugins? Let me know in the comments which one worked for your site. wordpress plugin to require email for a download
Do you want to grow your email list while giving away free eBooks, checklists, software, or PDFs? EDD is a full-featured digital eCommerce plugin
This lightweight plugin can require email but needs a tiny bit of manual setup. wordpress plugin to require email for a download