flexfax: Mail to fax gateway?

[Ted Sudtell <tsudtell@northtech.net>]

Using RH5.1 and installed hylaFAX with RPM's and a few needed changes.
Receives fine.  Can someone point me to info on how to use the Mail
gateway?
The docs on vix.com point to a "mailfix.sh-sendmail" file. I do not have
one anywhere. The man pages say a .hyf?? in user dir. But no info on
what should go into it.
Is mail the only way to fax from a client machine? Like w95?

Thanks again for all the past help.

Ted