Here is how to set up a machine that sits on the Internet and
that forwards mail to a LAN that is connected via UUCP. See
LAN to UUCP gateway section for
the other side of the story.
You need an rmail program that extracts the sender
address from mail that arrives via UUCP, and that feeds the mail
into the Postfix sendmail command. Most UNIX systems come
with an rmail utility. If you're in a pinch, try the one
bundled with the Postfix source code in the auxiliary/rmail
pipe(8) based mail delivery transport for delivery
uucp unix - n n - - pipe
flags=F user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
This runs the uux command to place outgoing mail into
the UUCP queue after replacing $nexthop by the next-hop hostname
(the receiving UUCP host) and after replacing $recipient by the
pipe(8) delivery agent executes the uux
command without assistance from the shell, so there are no problems
with shell meta characters in command-line parameters.
Specify that mail for example.com, should be
delivered via UUCP, to a host named uucp-host:
transport(5) manual page for more details.
Execute the command "postmap /etc/postfix/transport"
whenever you change the transport file.
Enable transport table lookups:
transport_maps = hash:/etc/postfix/transport
Specify dbm instead of hash if your system uses
dbm files instead of db files. To find out what map
types Postfix supports, use the command "postconf -m".
Add example.com to the list of domains that your site
is willing to relay mail for.
relay_domains = example.com ...other
relay_domains configuration parameter description for
Execute the command "postfix reload" to make the