Email to Fax

Hi, I was wondering if anybody had any views on this topic... I understand how to recieve faxes and then send them to an email address, however I wondered if Trixbox (or Asterisk on its own) could recieve an email and then send it as a fax to a fax number, sort of the reverse of FAX to email.
The recieveing email would be in the format of fax-number@my-trixboxserver.tld,fax-number being the number I wish to send to. If not does anybody know of any software that could be capable of this but using VOIP rather than PSTN.. ie linking it to a SIP trunk or the TB server itself

Thanks
Jedski