I made a simple form to register for an event and put it up on a clients website.
The form can be filled out but when the end user tries to submit the form on the website, Acrobat reader comes back with "this operation is not permitted".
When I submit from the original form, (not on the website) it works just fine.
The submit button is configured as "mailto:email@domain.com" without the quotation marks, of course.
I'm running Acrobat Pro 9 from CS5