You can use a webservice in the XFA form if you want to send some data to the user. You can go to data view of the LiveCycle Designer while designing the form to add a webservice to a form. For details p[lz go through http://forms.stefcameron.com/category/data-binding/page/4/ post.

As of today, Mobile Form doesn't support submission by email out of the box. But you can use submit service proxy to send out email rather than normal HTTP POST. You can browse through my blog post to get the detail on how to configure this.

You can use the following script on the click of a button and hiding your submit button:EmailSubmitButton1.event__click.resolveNode("#submit").target = "mailto:consumer@aabcd.com;"+To.rawValue+"?subject="+Subject.rawValue+"&body="+Body.rawValue;EmailSubmitButton1.execEvent("click");