Reply To: Buttons and Self-Attaching PDF to New E-Mail

You have to use Acrobat Pro (not Reader) to mkae the interactive button. Use the submit button, with the submit via email option. You'll be able to specify the mail to address, subject line, and what format you want the form data to be attached. There's an option to just have the user completed form pdf sent back.

The last step is to enable end user rights, which lets the user save the pdf prior to sending. Once you do that you can't open that pdf to edit the form, so be sure you save a copy before enabling.

So far as I know, there's no other way to do that sort of interactivty from InDesign.