# Mail addressed explicitly to the domain gateway (us)
R$*<@LOCAL>             $@$>30$1               strip our name, retry
R<@LOCAL>:$+            $@$>30$1               retry after route strip

# For numeric spec, you can't pass spec on to receiver, since old rcvr's
# are not smart enough to know that [x.y.z.a] is their own name.
R<@[$+]>:$*             $:$>9 <@[$1]>:$2       Clean it up, then...
R<@[$+]>:$*             $#ether $@[$1] $:$2    numeric internet spec
R<@[$+]>,$*             $#ether $@[$1] $:$2    numeric internet spec
R$*<@[$+]>              $#ether $@[$2] $:$1    numeric internet spec

# deliver to known ethernet hosts explicitly specified in our domain
R$*<@$%y.LOCAL>$*       $#ether $@$2 $:$1<@$2>$3      user@host.sun.com
# deliver to hosts in our domain that have an MX record
R$*<@$%x.LOCAL>$*       $#ether $@$2 $:$1<@$2>$3      user@host.sun.com

# etherhost.uucp is treated as etherhost.$m for now.
# This allows them to be addressed from uucp as foo!sun!etherhost!user.
R$*<@$%y.uucp>$*        $#ether $@$2 $:$1<@$2>$3      user@etherhost.uucp

# Explicitly specified names in our domain -- that we've never heard of
R$*<@$*.LOCAL>$*        $#error $:Never heard of host $2 in domain $m

# Clean up addresses for external use -- kills LOCAL, route-addr ,=>: 
R$*                     $:$>9 $1               Then continue...

# resolve UUCP-style names
R<@$-.uucp>:$+          $#uucp  $@$1 $:$2      @host.uucp:...
R$+<@$-.uucp>           $#uucp  $@$2 $:$1      user@host.uucp

# Pass other valid names up the ladder to our forwarder
#R$*<@$*.$=T>$*         $#$M    $@$R $:$1<@$2.$3>$4    user@domain.known

# Replace following with above to only forward "known" top-level domains
R$*<@$*.$+>$*           $#$M    $@$R $:$1<@$2.$3>$4    user@any.domain

# if you are on the DDN, then comment-out both of the lines above
# and use the following instead:
#R$*<@$*.$+>$*          $#ddn $@ $2.$3 $:$1<@$2.$3>$4  user@any.domain