atux - 2016-02-08

hello everyone. i have compiled my self asterisk 11 and freepbx 2.11. i have installed postfix, iaxmodem, hylafax and i am using a gmail account (eg atux1@gmail.com) only to send emails. through that i am receiving all the faxes to emails.
i would like to do the opposite. send an email from eg atux2@gmail.com to atux1@gmail.com and then the attachment will be send from hylafax as fax.
has anyone any idea on how to do that?