Email to which the messages will be sent written by the users.

Name that will be the people who want escribirte a message.

It indicates the method that will be used so that the users write the message: by means of a form of this page or through its manager of mail by defecto.
Si you do not know as to choose, it leaves the option of Formulario.

It indicates if it is allowed that the sent messages contain labels HTML like, for example, negritas or cursivas.
Sólo is applied to messages sent through form.

He indicates if the user will have to introduce his email to be able enviarte mensaje.
Sólo is applied to messages sent through form.