The pathtable is used to define explicit routing to remote hosts or networks. The pathtable file should be in pathalias-style syntax, sorted alphabetically. The two fields on each line must be separated by a real TAB, else dbm might complain.
Most systems will not need any pathtable entries.
#=============== /usr/local/lib/mail/pathtable ================
#
# this is a pathalias-style paths file to let you kick mail to
# UUCP neighbors to the direct UUCP path so you don't have to
# go the long way through your smart host that takes other traffic
#
# you want real tabs on each line or m4 might complain
#
# route mail through one or more intermediate sites to a remote
# system using UUCP-style addressing.
#
sesame!ernie!%s ernie
#
# forwarding to a system that is a UUCP neighbor of a reachable
# internet site.
#
swim!%s@gcc.groucho.edu swim
#
# The following sends all mail for two networks through different
# gateways (see the leading '.' ?).
# In this example, "uugate" and "byte" are specific systems that serve
# as mail gateways to the .UUCP and .BITNET pseudo-domains respectively
#
%s@uugate.groucho.edu .UUCP
byte!%s@mail.shift.com .BITNET
#
#=================== end of pathtable =======================