try "uplink" (Score 1)

Hi, "uplink" is a free complete solution for a
fax/email/http/other gateway. It supports
faxing from windows using a samba print queue.
The URL is

http://www.ime.usp.br/~ueda/uplink/

"uplink" is currently beta software, but the fax
features are under heavy usage in more than
one installation. Cheers,

Ricardo Ueda.