Fax out configure with fax-in working?

does I need to configure for anything refer to fax-out if the fax-in is ok? with pstn line and TDM card plus fax machine?
Currently I am using trixbox 1.2.3 for the system and fax machine is connecting to FXS port. I have tested it the fax in is working fine.

I have set the general settings, and inbound routing with email address, however I cannot receive the email for fax although i can receive the fax by the fax machine, I can receive the voicemail as email. anything wrong with it?

I have another server with puer freepbx 2.1.3 + asterisk 1.2.3 only, then do i need to install NVFax manually in order to use it to detect the fax?