Mail blocked by antispam

Hi, I have a problem with email of prenotation form sended by this plug-in.
the problem is that the sender of that e-mail is the mail of the client and this was blocked by antispam.

i have fix the problem changing the code of formAjax.php. row 142 inserting the fixed email address.

Is possible to add a new option for use a fixed email (or choose if use a fixed or client inserted mail)

thanks