Re: [hylafax-users] E-mail to fax gateway for Hylafax?

[Lee Howard <faxguy@deanox.com>]

If you want to have the domain of the e-mail address in a fashion such as
1234567@fax.intranet then you need to mangle sendmail in such a way that
the false domain is recognized as valid and deliverable through a HylaFAX
dispatcher.  Either that, or you need to set up a virtual domain, but in
either case, sendmail has to know where to send the e-mail (which local
fax-MDA) without using DNS.

There are good examples of how this is done at:
http://www.hylafax.org/howto/faxing.php#ss5.4