It actually does work, but for some reason only on the second click. When I first clicked it just moved the page to the top, then I scrolled down to the post with the attachment, clicked it again, and the download started.
Thanks for posting your form and it works great.
However, when I try to implement only part of your form (dropdownlist with binding emails, Fake email Button with Click event and invisible RealEmail button) with LifeCycle Desiger ES 8.2, it just didn't work when opening it in Reader. Is it because I don't have Reader Entensions?
Is Acrobat Pro able to achieve same function without using Reader Extension?