This is the shortcode I'm using right now:
[contact-form to='myemail@gmail.com' subject='Contacto leandroperez.com.ar'][contact-field label='Nombre' type='name' required='1'/][contact-field label='Email' type='email' required='1'/][contact-field label='Web' type='url'/][contact-field label='Teléfono' type='text'/][contact-field label='Mensaje' type='textarea' required='1'/][/contact-form]
Thanks