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-rw-r--r--usr.sbin/sendmail/cf/m4/proto.m4689
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diff --git a/usr.sbin/sendmail/cf/m4/proto.m4 b/usr.sbin/sendmail/cf/m4/proto.m4
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--- /dev/null
+++ b/usr.sbin/sendmail/cf/m4/proto.m4
@@ -0,0 +1,689 @@
+divert(-1)
+#
+# Copyright (c) 1983 Eric P. Allman
+# Copyright (c) 1988, 1993
+# The Regents of the University of California. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+# 3. All advertising materials mentioning features or use of this software
+# must display the following acknowledgement:
+# This product includes software developed by the University of
+# California, Berkeley and its contributors.
+# 4. Neither the name of the University nor the names of its contributors
+# may be used to endorse or promote products derived from this software
+# without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+divert(0)
+
+VERSIONID(`@(#)proto.m4 8.45 (Berkeley) 3/4/94')
+
+MAILER(local)dnl
+
+ifdef(`_OLD_SENDMAIL_',
+`define(`_SET_95_', 5)dnl
+define(`_SET_96_', 6)dnl
+define(`_SET_97_', 7)dnl
+define(`_SET_98_', 8)dnl
+define(`confDOMAIN_NAME',
+ `ifdef(`NEED_DOMAIN', `$w.$d', `$w')')dnl',
+`# level 5 config file format
+V5
+define(`_SET_95_', 95)dnl
+define(`_SET_96_', 96)dnl
+define(`_SET_97_', 97)dnl
+define(`_SET_98_', 98)dnl')
+ifdef(`confSMTP_MAILER',, `define(`confSMTP_MAILER', `smtp')')dnl
+ifdef(`confLOCAL_MAILER',, `define(`confLOCAL_MAILER', `local')')dnl
+ifdef(`confRELAY_MAILER',,
+ `define(`confRELAY_MAILER',
+ `ifdef(`_MAILER_smtp_', `relay',
+ `ifdef(`_MAILER_uucp', `suucp', `unknown')')')')dnl
+define(`_SMTP_', `confSMTP_MAILER')dnl for readability only
+define(`_LOCAL_', `confLOCAL_MAILER')dnl for readability only
+define(`_RELAY_', `confRELAY_MAILER')dnl for readability only
+
+##################
+# local info #
+##################
+
+Cwlocalhost
+ifdef(`USE_CW_FILE',
+`# file containing names of hosts for which we receive email
+Fw`'confCW_FILE',
+ `dnl')
+ifdef(`confDOMAIN_NAME', `
+# my official domain name
+Dj`'confDOMAIN_NAME',
+ `dnl')
+
+ifdef(`_NULL_CLIENT_ONLY_',
+`include(../m4/nullrelay.m4)m4exit',
+ `dnl')
+
+CP.
+
+ifdef(`UUCP_RELAY',
+`# UUCP relay host
+DY`'UUCP_RELAY
+CPUUCP
+
+')dnl
+ifdef(`BITNET_RELAY',
+`# BITNET relay host
+DB`'BITNET_RELAY
+CPBITNET
+
+')dnl
+ifdef(`FAX_RELAY',
+`# FAX relay host
+DF`'FAX_RELAY
+CPFAX
+
+')dnl
+# "Smart" relay host (may be null)
+DS`'ifdef(`SMART_HOST', SMART_HOST)
+
+ifdef(`MAILER_TABLE',
+`# Mailer table (overriding domains)
+Kmailertable MAILER_TABLE
+
+')dnl
+ifdef(`DOMAIN_TABLE',
+`# Domain table (adding domains)
+Kdomaintable DOMAIN_TABLE
+
+')dnl
+# who I send unqualified names to (null means deliver locally)
+DR`'ifdef(`LOCAL_RELAY', LOCAL_RELAY)
+
+# who gets all local email traffic ($R has precedence for unqualified names)
+DH`'ifdef(`MAIL_HUB', MAIL_HUB)
+
+# who I masquerade as (null for no masquerading)
+DM`'ifdef(`MASQUERADE_NAME', MASQUERADE_NAME)
+
+# class L: names that should be delivered locally, even if we have a relay
+# class E: names that should be exposed as from this host, even if we masquerade
+#CLroot
+CEroot
+undivert(5)dnl
+
+# operators that cannot be in local usernames (i.e., network indicators)
+CO @ % ifdef(`_NO_UUCP_', `', `!')
+
+# a class with just dot (for identifying canonical names)
+C..
+
+ifdef(`_OLD_SENDMAIL_', `dnl',
+`# dequoting map
+Kdequote dequote')
+
+undivert(6)dnl
+
+######################
+# Special macros #
+######################
+
+# SMTP initial login message
+De`'confSMTP_LOGIN_MSG
+
+# UNIX initial From header format
+Dl`'confFROM_LINE
+
+# my name for error messages
+Dn`'confMAILER_NAME
+
+# delimiter (operator) characters
+Do`'confOPERATORS
+
+# format of a total name
+Dq`'ifdef(`confFROM_HEADER', confFROM_HEADER,
+ ifdef(`_OLD_SENDMAIL_', `$g$?x ($x)$.', `$?x$x <$g>$|$g$.'))
+include(`../m4/version.m4')
+
+###############
+# Options #
+###############
+
+# strip message body to 7 bits on input?
+O7`'confSEVEN_BIT_INPUT
+
+# wait (in minutes) for alias file rebuild
+Oa`'confALIAS_WAIT
+
+# location of alias file
+OA`'ifdef(`ALIAS_FILE', `ALIAS_FILE', /etc/aliases)
+
+# minimum number of free blocks on filesystem
+Ob`'confMIN_FREE_BLOCKS
+
+# substitution for space (blank) characters
+OB`'confBLANK_SUB
+
+# avoid connecting to "expensive" mailers on initial submission?
+Oc`'confCON_EXPENSIVE
+
+# checkpoint queue runs after every N successful deliveries
+OC`'confCHECKPOINT_INTERVAL
+
+# default delivery mode
+Od`'confDELIVERY_MODE
+
+# automatically rebuild the alias database?
+OD`'confAUTO_REBUILD
+
+# error message header/file
+ifdef(`confERROR_MESSAGE',
+ OE`'confERROR_MESSAGE,
+ #OE/etc/sendmail.oE)
+
+# error mode
+ifdef(`confERROR_MODE',
+ Oe`'confERROR_MODE,
+ #Oep)
+
+# save Unix-style "From_" lines at top of header?
+Of`'confSAVE_FROM_LINES
+
+# temporary file mode
+OF`'confTEMP_FILE_MODE
+
+# match recipients against GECOS field?
+OG`'confMATCH_GECOS
+
+# default GID
+Og`'confDEF_GROUP_ID
+
+# maximum hop count
+Oh`'confMAX_HOP
+
+# location of help file
+OH`'ifdef(`HELP_FILE', HELP_FILE, /usr/lib/sendmail.hf)
+
+# ignore dots as terminators in incoming messages?
+Oi`'confIGNORE_DOTS
+
+# Insist that the BIND name server be running to resolve names
+ifdef(`confBIND_OPTS',
+ OI`'confBIND_OPTS,
+ #OI)
+
+# deliver MIME-encapsulated error messages?
+Oj`'confMIME_FORMAT_ERRORS
+
+# Forward file search path
+ifdef(`confFORWARD_PATH',
+ OJ`'confFORWARD_PATH,
+ #OJ/var/forward/$u:$z/.forward.$w:$z/.forward)
+
+# open connection cache size
+Ok`'confMCI_CACHE_SIZE
+
+# open connection cache timeout
+OK`'confMCI_CACHE_TIMEOUT
+
+# use Errors-To: header?
+Ol`'confUSE_ERRORS_TO
+
+# log level
+OL`'confLOG_LEVEL
+
+# send to me too, even in an alias expansion?
+Om`'confME_TOO
+
+# verify RHS in newaliases?
+On`'confCHECK_ALIASES
+
+# default messages to old style headers if no special punctuation?
+Oo`'confOLD_STYLE_HEADERS
+
+# SMTP daemon options
+ifdef(`confDAEMON_OPTIONS',
+ OO`'confDAEMON_OPTIONS,
+ #OOPort=esmtp)
+
+# privacy flags
+Op`'confPRIVACY_FLAGS
+
+# who (if anyone) should get extra copies of error messages
+ifdef(`confCOPY_ERRORS_TO',
+ OP`'confCOPY_ERRORS_TO,
+ #OPPostmaster)
+
+# slope of queue-only function
+ifdef(`confQUEUE_FACTOR',
+ Oq`'confQUEUE_FACTOR,
+ #Oq600000)
+
+# queue directory
+OQ`'ifdef(`QUEUE_DIR', QUEUE_DIR, /var/spool/mqueue)
+
+# read timeout -- now OK per RFC 1123 section 5.3.2
+ifdef(`confREAD_TIMEOUT',
+ Or`'confREAD_TIMEOUT,
+ #Ordatablock=10m)
+
+# queue up everything before forking?
+Os`'confSAFE_QUEUE
+
+# status file
+OS`'ifdef(`STATUS_FILE', STATUS_FILE, /etc/sendmail.st)
+
+# default message timeout interval
+OT`'confMESSAGE_TIMEOUT
+
+# time zone handling:
+# if undefined, use system default
+# if defined but null, use TZ envariable passed in
+# if defined and non-null, use that info
+ifelse(confTIME_ZONE, `USE_SYSTEM', `#Ot',
+ confTIME_ZONE, `USE_TZ', `Ot',
+ `Ot`'confTIME_ZONE')
+
+# default UID
+Ou`'confDEF_USER_ID
+
+# list of locations of user database file (null means no lookup)
+OU`'ifdef(`confUSERDB_SPEC', `confUSERDB_SPEC')
+
+# fallback MX host
+ifdef(`confFALLBACK_MX',
+ OV`'confFALLBACK_MX,
+ #OVfall.back.host.net)
+
+# if we are the best MX host for a site, try it directly instead of config err
+Ow`'confTRY_NULL_MX_LIST
+
+# load average at which we just queue messages
+Ox`'confQUEUE_LA
+
+# load average at which we refuse connections
+OX`'confREFUSE_LA
+
+# work recipient factor
+ifdef(`confWORK_RECIPIENT_FACTOR',
+ Oy`'confWORK_RECIPIENT_FACTOR,
+ #Oy30000)
+
+# deliver each queued job in a separate process?
+OY`'confSEPARATE_PROC
+
+# work class factor
+ifdef(`confWORK_CLASS_FACTOR',
+ Oz`'confWORK_CLASS_FACTOR,
+ #Oz1800)
+
+# work time factor
+ifdef(`confWORK_TIME_FACTOR',
+ OZ`'confWORK_TIME_FACTOR,
+ #OZ90000)
+
+###########################
+# Message precedences #
+###########################
+
+Pfirst-class=0
+Pspecial-delivery=100
+Plist=-30
+Pbulk=-60
+Pjunk=-100
+
+#####################
+# Trusted users #
+#####################
+
+Troot
+Tdaemon
+Tuucp
+
+#########################
+# Format of headers #
+#########################
+
+H?P?Return-Path: $g
+HReceived: $?sfrom $s $.$?_($?s$|from $.$_) $.by $j ($v/$Z)$?r with $r$. id $i$?u for $u$.; $b
+H?D?Resent-Date: $a
+H?D?Date: $a
+H?F?Resent-From: $q
+H?F?From: $q
+H?x?Full-Name: $x
+HSubject:
+# HPosted-Date: $a
+# H?l?Received-Date: $b
+H?M?Resent-Message-Id: <$t.$i@$j>
+H?M?Message-Id: <$t.$i@$j>
+#
+######################################################################
+######################################################################
+#####
+##### REWRITING RULES
+#####
+######################################################################
+######################################################################
+
+undivert(9)dnl
+
+###########################################
+### Rulset 3 -- Name Canonicalization ###
+###########################################
+S3
+
+# handle null input (translate to <@> special case)
+R$@ $@ <@>
+
+# basic textual canonicalization -- note RFC733 heuristic here
+R$*<$*>$*<$*>$* $2$3<$4>$5 strip multiple <> <>
+R$*<$*<$+>$*>$* <$3>$5 2-level <> nesting
+R$*<>$* $@ <@> MAIL FROM:<> case
+R$*<$+>$* $2 basic RFC821/822 parsing
+
+# handle list:; syntax as special case
+R$*:;$* $@ $1 :; <@>
+
+# make sure <@a,@b,@c:user@d> syntax is easy to parse -- undone later
+R@ $+ , $+ @ $1 : $2 change all "," to ":"
+
+# localize and dispose of route-based addresses
+R@ $+ : $+ $@ $>_SET_96_ < @$1 > : $2 handle <route-addr>
+
+# find focus for list syntax
+R $+ : $* ; @ $+ $@ $>_SET_96_ $1 : $2 ; < @ $3 > list syntax
+R $+ : $* ; $@ $1 : $2; list syntax
+
+# find focus for @ syntax addresses
+R$+ @ $+ $: $1 < @ $2 > focus on domain
+R$+ < $+ @ $+ > $1 $2 < @ $3 > move gaze right
+R$+ < @ $+ > $@ $>_SET_96_ $1 < @ $2 > already canonical
+
+# do some sanity checking
+R$* < @ $* : $* > $* $1 < @ $2 $3 > $4 nix colons in addrs
+
+ifdef(`_NO_UUCP_', `dnl',
+`# convert old-style addresses to a domain-based address
+R$- ! $+ $@ $>_SET_96_ $2 < @ $1 .UUCP > resolve uucp names
+R$+ . $- ! $+ $@ $>_SET_96_ $3 < @ $1 . $2 > domain uucps
+R$+ ! $+ $@ $>_SET_96_ $2 < @ $1 .UUCP > uucp subdomains')
+
+# if we have % signs, take the rightmost one
+R$* % $* $1 @ $2 First make them all @s.
+R$* @ $* @ $* $1 % $2 @ $3 Undo all but the last.
+R$* @ $* $@ $>_SET_96_ $1 < @ $2 > Insert < > and finish
+
+# else we must be a local name
+
+
+################################################
+### Ruleset _SET_96_ -- bottom half of ruleset 3 ###
+################################################
+
+# At this point, everything should be in a "local_part<@domain>extra" format.
+S`'_SET_96_
+
+# handle special cases for local names
+R$* < @ localhost > $* $: $1 < @ $j . > $2 no domain at all
+R$* < @ localhost . $m > $* $: $1 < @ $j . > $2 local domain
+ifdef(`_NO_UUCP_', `dnl',
+`R$* < @ localhost . UUCP > $* $: $1 < @ $j . > $2 .UUCP domain')
+R$* < @ [ $+ ] > $* $: $1 < @@ [ $2 ] > $3 mark [a.b.c.d]
+R$* < @@ $=w > $* $: $1 < @ $j . > $3 self-literal
+R$* < @@ $+ > $* $@ $1 < @ $2 > $3 canon IP addr
+ifdef(`DOMAIN_TABLE', `
+# look up unqualified domains in the domain table
+R$* < @ $- > $* $: $1 < @ $(domaintable $2 $) > $3',
+`dnl')
+undivert(2)dnl
+
+ifdef(`_NO_UUCP_', `dnl',
+`ifdef(`UUCP_RELAY',
+`# pass UUCP addresses straight through
+R$* < @ $+ . UUCP > $* $@ $1 < @ $2 . UUCP . > $3',
+`# if really UUCP, handle it immediately
+ifdef(`_CLASS_U_',
+`R$* < @ $=U . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl')
+ifdef(`_CLASS_V_',
+`R$* < @ $=V . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl')
+ifdef(`_CLASS_W_',
+`R$* < @ $=W . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl')
+ifdef(`_CLASS_X_',
+`R$* < @ $=X . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl')
+ifdef(`_CLASS_Y_',
+`R$* < @ $=Y . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl')
+
+# try UUCP traffic as a local address
+R$* < @ $+ . UUCP > $* $: $1 < @ $[ $2 $] . UUCP . > $3
+ifdef(`_OLD_SENDMAIL_',
+`R$* < @ $+ . $+ . UUCP . > $* $@ $1 < @ $2 . $3 . > $4',
+`R$* < @ $+ . . UUCP . > $* $@ $1 < @ $2 . > $3')')
+')
+ifdef(`_NO_CANONIFY_', `dnl',
+`# pass to name server to make hostname canonical
+R$* < @ $* $~P > $* $: $1 < @ $[ $2 $3 $] > $4')
+
+# local host aliases and pseudo-domains are always canonical
+R$* < @ $=w > $* $: $1 < @ $2 . > $3
+R$* < @ $* $=P > $* $: $1 < @ $2 $3 . > $4
+R$* < @ $* . . > $* $1 < @ $2 . > $3
+
+# if this is the local hostname, make sure we treat is as canonical
+R$* < @ $j > $* $: $1 < @ $j . > $2
+
+
+##################################################
+### Ruleset 4 -- Final Output Post-rewriting ###
+##################################################
+S4
+
+R$*<@> $@ $1 handle <> and list:;
+
+# strip trailing dot off possibly canonical name
+R$* < @ $+ . > $* $1 < @ $2 > $3
+
+# externalize local domain info
+R$* < $+ > $* $1 $2 $3 defocus
+R@ $+ : @ $+ : $+ @ $1 , @ $2 : $3 <route-addr> canonical
+R@ $* $@ @ $1 ... and exit
+
+ifdef(`_NO_UUCP_', `dnl',
+`# UUCP must always be presented in old form
+R$+ @ $- . UUCP $2!$1 u@h.UUCP => h!u')
+
+# delete duplicate local names
+R$+ % $=w @ $=w $1 @ $j u%host@host => u@host
+
+
+
+##############################################################
+### Ruleset _SET_97_ -- recanonicalize and call ruleset zero ###
+### (used for recursive calls) ###
+##############################################################
+
+S`'_SET_97_
+R$* $: $>3 $1
+R$* $@ $>0 $1
+
+
+######################################
+### Ruleset 0 -- Parse Address ###
+######################################
+
+S0
+
+R<@> $#_LOCAL_ $: <> special case error msgs
+R$* : $* ; $#error $@ USAGE $: "list:; syntax illegal for recipient addresses"
+R<@ $+> $#error $@ USAGE $: "user address required"
+R<$* : $* > $#error $@ USAGE $: "colon illegal in host name part"
+
+ifdef(`_MAILER_smtp_',
+`# handle numeric address spec
+R$* < @ [ $+ ] > $* $: $>_SET_98_ $1 < @ [ $2 ] > $3 numeric internet spec
+R$* < @ [ $+ ] > $* $#_SMTP_ $@ [$2] $: $1 < @ [$2] > $3 still numeric: send',
+ `dnl')
+
+# now delete the local info -- note $=O to find characters that cause forwarding
+R$* < @ > $* $@ $>_SET_97_ $1 user@ => user
+R< @ $=w . > : $* $@ $>_SET_97_ $2 @here:... -> ...
+R$* $=O $* < @ $=w . > $@ $>_SET_97_ $1 $2 $3 ...@here -> ...
+
+# handle local hacks
+R$* $: $>_SET_98_ $1
+
+# short circuit local delivery so forwarded email works
+ifdef(`_LOCAL_NOT_STICKY_',
+`R$=L < @ $=w . > $#_LOCAL_ $: @ $1 special local names
+R$+ < @ $=w . > $#_LOCAL_ $: $1 dispose directly',
+`R$+ < @ $=w . > $: $1 < @ $2 . @ $H > first try hub
+ifdef(`_OLD_SENDMAIL_',
+`R$+ < $+ @ $-:$+ > $# $3 $@ $4 $: $1 < $2 > yep ....
+R$+ < $+ @ $+ > $#relay $@ $3 $: $1 < $2 > yep ....
+R$+ < $+ @ > $#_LOCAL_ $: $1 nope, local address',
+`R$+ < $+ @ $+ > $#_LOCAL_ $: $1 yep ....
+R$+ < $+ @ > $#_LOCAL_ $: @ $1 nope, local address')')
+ifdef(`MAILER_TABLE',
+`
+# not local -- try mailer table lookup
+R$* <@ $+ > $* $: < $2 > $1 < @ $2 > $3 extract host name
+R< $+ . > $* $: < $1 > $2 strip trailing dot
+R< $+ > $* $: < $(mailertable $1 $) > $2 lookup
+R< $- : $+ > $* $# $1 $@ $2 $: $3 check -- resolved?
+R< $+ > $* $: $>90 <$1> $2 try domain',
+`dnl')
+undivert(4)dnl
+
+ifdef(`_NO_UUCP_', `dnl',
+`# resolve remotely connected UUCP links (if any)
+ifdef(`_CLASS_V_',
+`R$* < @ $=V . UUCP . > $* $: $>_SET_95_ < $V > $1 <@$2.UUCP.> $3',
+ `dnl')
+ifdef(`_CLASS_W_',
+`R$* < @ $=W . UUCP . > $* $: $>_SET_95_ < $W > $1 <@$2.UUCP.> $3',
+ `dnl')
+ifdef(`_CLASS_X_',
+`R$* < @ $=X . UUCP . > $* $: $>_SET_95_ < $X > $1 <@$2.UUCP.> $3',
+ `dnl')')
+
+# resolve fake top level domains by forwarding to other hosts
+ifdef(`BITNET_RELAY',
+`R$*<@$+.BITNET.>$* $: $>_SET_95_ < $B > $1 <@$2.BITNET.> $3 user@host.BITNET',
+ `dnl')
+ifdef(`_MAILER_pop_',
+`R$+ < @ POP. > $#pop $: $1 user@POP',
+ `dnl')
+ifdef(`_MAILER_fax_',
+`R$+ < @ $+ .FAX. > $#fax $@ $2 $: $1 user@host.FAX',
+`ifdef(`FAX_RELAY',
+`R$*<@$+.FAX.>$* $: $>_SET_95_ < $F > $1 <@$2.FAX.> $3 user@host.FAX',
+ `dnl')')
+
+ifdef(`UUCP_RELAY',
+`# forward non-local UUCP traffic to our UUCP relay
+R$*<@$*.UUCP.>$* $: $>_SET_95_ < $Y > $1 <@$2.UUCP.> $3 uucp mail',
+`ifdef(`_MAILER_uucp_',
+`# forward other UUCP traffic straight to UUCP
+R$* < @ $+ .UUCP. > $* $#uucp $@ $2 $: $1 < @ $2 .UUCP. > $3 user@host.UUCP',
+ `dnl')')
+ifdef(`_MAILER_usenet_', `
+# addresses sent to net.group.USENET will get forwarded to a newsgroup
+R$+ . USENET $#usenet $: $1',
+ `dnl')
+
+ifdef(`_LOCAL_RULES_',
+`# figure out what should stay in our local mail system
+undivert(1)', `dnl')
+
+# pass names that still have a host to a smarthost (if defined)
+R$* < @ $* > $* $: $>_SET_95_ < $S > $1 < @ $2 > $3 glue on smarthost name
+
+# deal with other remote names
+ifdef(`_MAILER_smtp_',
+`R$* < @$* > $* $#_SMTP_ $@ $2 $: $1 < @ $2 > $3 user@host.domain',
+`R$* < @$* > $* $#error $@NOHOST $: Unrecognized host name $2')
+
+ifdef(`_OLD_SENDMAIL_',
+`# forward remaining names to local relay, if any
+R$=L $#_LOCAL_ $: $1 special local names
+R$+ $: $>_SET_95_ < $R > $1 try relay
+R$+ $: $>_SET_95_ < $H > $1 try hub
+R$+ $#_LOCAL_ $: $1 no relay or hub: local',
+
+`# if this is quoted, strip the quotes and try again
+R$+ $: $(dequote $1 $) strip quotes
+R$+ $=O $+ $@ $>_SET_97_ $1 $2 $3 try again
+
+# handle locally delivered names
+R$=L $#_LOCAL_ $: @ $1 special local names
+R$+ $#_LOCAL_ $: $1 regular local names
+
+###########################################################################
+### Ruleset 5 -- special rewriting after aliases have been expanded ###
+### (new sendmail only) ###
+###########################################################################
+
+S5
+
+# see if we have a relay or a hub
+R$+ $: < $R > $1 try relay
+R< > $+ $: < $H > $1 try hub
+R< > $+ $@ $1 nope, give up
+R< $- : $+ > $+ $: $>_SET_95_ < $1 : $2 > $3 < @ $2 >
+R< $+ > $+ $@ $>_SET_95_ < $1 > $2 < @ $1 >')
+ifdef(`MAILER_TABLE',
+`
+
+###################################################################
+### Ruleset 90 -- try domain part of mailertable entry ###
+### (new sendmail only) ###
+###################################################################
+
+S90
+R$* <$- . $+ > $* $: $1$2 < $(mailertable .$3 $@ $1$2 $@ $2 $) > $4
+R$* <$- : $+ > $* $# $2 $@ $3 $: $4 check -- resolved?
+R$* < . $+ > $* $@ $>90 $1 . <$2> $3 no -- strip & try again
+R$* < $* > $* $: < $(mailertable . $@ $1$2 $) > $3 try "."
+R<$- : $+ > $* $# $1 $@ $2 $: $3 "." found?
+R< $* > $* $@ $2 no mailertable match',
+`dnl')
+
+###################################################################
+### Ruleset _SET_95_ -- canonify mailer:host syntax to triple ###
+###################################################################
+
+S`'_SET_95_
+R< > $* $@ $1 strip off null relay
+R< $- : $+ > $* $# $1 $@ $2 $: $3 try qualified mailer
+R< $=w > $* $@ $2 delete local host
+R< $+ > $* $#_RELAY_ $@ $1 $: $2 use unqualified mailer
+
+###################################################################
+### Ruleset _SET_98_ -- local part of ruleset zero (can be null) ###
+###################################################################
+
+S`'_SET_98_
+undivert(3)dnl
+#
+######################################################################
+######################################################################
+#####
+`##### MAILER DEFINITIONS'
+#####
+######################################################################
+######################################################################
+undivert(7)dnl
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