NetBSD/usr.sbin/sendmail/cf/m4/postwriterule.m4

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#
# Sendmail
# Copyright (c) 1983 Eric P. Allman
# Berkeley, California
#
# Copyright (c) 1983 Regents of the University of California.
# All rights reserved. The Berkeley software License Agreement
# specifies the terms and conditions for redistribution.
#
# @(#)postwriterule.m4 1.8 (Berkeley) 1/3/89
#
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#################################
# Final Output Post-rewriting #
#################################
S4
R@ $@ handle <> error addr
# resolve numeric addresses to name if possible
R$*<@[$+]>$* $:$1<@$[[$2]$]>$3 lookup numeric internet addr
# externalize local domain info
R$*<$+>$* $1$2$3 defocus
R@$+:@$+:$+ @$1,@$2:$3 <route-addr> canonical
# UUCP must always be presented in old form
R$+@$-.UUCP $2!$1 u@h.UUCP => h!u
# delete duplicate local names
R$+%$=w@$=w $1@$w u%host@host => u@host
R$+%$=w@$=w.$D $1@$w u%host@host => u@host