[Asterisk-Users] How to configure Inter7's Asterisk Fax with Postfix

[Eddie]

Tzafrir,

We need to send an email with the fax number for astfax to fax.
eg: 
From: <example at example.org>
To: <15555555555 at example.org>
Subject: ...

<attach fax image>

How to configure postfix to understand and deliver this?
I've tried putting this line in /etc/aliases :
fax:        |/var/mail/ast_fax/ast_fax /var/mail/ast_fax/ast_fax.call

It don't seems to works.