I too had this issue, which is not documented correctly. I sent a
support request, and received a response. Drag a button to your the doc,
in the Object Field Tab choose Control Type Submit. In Object Submit Tab
type mailto:xxxxxxxx@domain.com for the address you want it sent to. Use
the drop down Submit As to select PDF. Save the file and open it with
acrobat, in the drop down Advanced menu select Extend Features in Adobe
Reader. That's it it works.