Send an eBook or PDF after user subscription
First, you need to create an automatic newsletter to send after a new subscription:
You can choose one of the 2 options above depending on your case (new WordPress user or new MailPoet subscription).
Then when you are on the newsletter editor, you just need to add a link to the PDF file to an image or text on your newsletter.
Here's an example to add a link to a PDF into an image:
Then, add the link: