I hope someone has run into this. I have acrobat 11.0.10 to create fill-able forms and reader 11.0.10 to view and fill them. Do to the nature of the forms a drawn signature is required and is available right up until I add a submit button with a mailto: action. Then all that is available in the reader is the digital certificate. I should add that I save the form without reader extensions. Is there a way to add the auto-adressed mailto function for the person filling the form and still keep the drawable signature option for signing?