#
# Copyright (c) 1998-2004, 2009, 2010 Proofpoint, Inc. and its suppliers.
#	All rights reserved.
# Copyright (c) 1983, 1995 Eric P. Allman.  All rights reserved.
# Copyright (c) 1988, 1993
#	The Regents of the University of California.  All rights reserved.
#
# By using this file, you agree to the terms and conditions set
# forth in the LICENSE file which can be found at the top level of
# the sendmail distribution.
#
# $FreeBSD: releng/12.2/contrib/sendmail/cf/m4/cfhead.m4 363465 2020-07-24 00:22:33Z gshapiro $
#

######################################################################
######################################################################
#####
#####		SENDMAIL CONFIGURATION FILE
#####
##### built by root@mail.ahlawat.com
##### in /etc/mail
##### using /usr/share/sendmail/cf/ as configuration include directory
#####
######################################################################
#####
#####	DO NOT EDIT THIS FILE!  Only edit the source .mc file.
#####
######################################################################
######################################################################

#####  $Id: cfhead.m4,v 8.122 2013-11-22 20:51:13 ca Exp $  #####
#####  $Id: cf.m4,v 8.33 2013-11-22 20:51:13 ca Exp $  #####

#####  $FreeBSD: releng/12.2/etc/sendmail/freebsd.mc 363465 2020-07-24 00:22:33Z gshapiro $  #####

#####  $Id: freebsd6.m4,v 1.2 2013-11-22 20:51:15 ca Exp $  #####


#####  $Id: generic.m4,v 8.16 2013-11-22 20:51:10 ca Exp $  #####

#####  $Id: redirect.m4,v 8.16 2013-11-22 20:51:11 ca Exp $  #####

#####  $Id: use_cw_file.m4,v 8.12 2013-11-22 20:51:11 ca Exp $  #####




#####  $Id: access_db.m4,v 8.28 2013-11-22 20:51:11 ca Exp $  #####


#####  $Id: blocklist_recipients.m4,v 8.14 2013-11-22 20:51:11 ca Exp $  #####


#####  $Id: local_lmtp.m4,v 8.18 2013-11-22 20:51:11 ca Exp $  #####


#####  $Id: mailertable.m4,v 8.26 2013-11-22 20:51:11 ca Exp $  #####


#####  $Id: virtusertable.m4,v 8.24 2013-11-22 20:51:11 ca Exp $  #####


























#####  $Id: proto.m4,v 8.762 2013-11-22 20:51:13 ca Exp $  #####

# level 10 config file format
V10/Berkeley

# override file safeties - setting this option compromises system security,
# addressing the actual file configuration problem is preferred
# need to set this before any file actions are encountered in the cf file
#O DontBlameSendmail=safe

# default LDAP map specification
# need to set this now before any LDAP maps are defined
#O LDAPDefaultSpec=-h localhost

##################
#   local info   #
##################

# my LDAP cluster
# need to set this before any LDAP lookups are done (including classes)
#D{sendmailMTACluster}$m

Cwlocalhost
# file containing names of hosts for which we receive email
Fw-o /etc/mail/local-host-names

# my official domain name
# ... define this only if sendmail cannot automatically determine your domain
Djmail.ahlawat.com

# host/domain names ending with a token in class P are canonical
CP.

# "Smart" relay host (may be null)
DSmail


# operators that cannot be in local usernames (i.e., network indicators)
CO @ % !

# a class with just dot (for identifying canonical names)
C..

# a class with just a left bracket (for identifying domain literals)
C[[

# access_db acceptance class
C{Accept}OK RELAY


# Resolve map (to check if a host exists in check_mail)
Kresolve host -a<OKR> -T<TEMP>
C{ResOk}OKR


# Hosts for which relaying is permitted ($=R)
FR-o /etc/mail/relay-domains

# arithmetic map
Karith arith
# macro storage map
Kmacro macro
# possible values for TLS_connection in access map
C{Tls}VERIFY ENCR
C{TlsVerified}OK TRUSTED





# dequoting map
Kdequote dequote

# class E: names that should be exposed as from this host, even if we masquerade
# class L: names that should be delivered locally, even if we have a relay
# class M: domains that should be converted to $M
# class N: domains that should not be converted to $M
#CL root
C{E}root



# my name for error messages
DnMAILER-DAEMON


CPREDIRECT

# Access list database (for spam stomping)
Kaccess hash -o -T<TMPF> /etc/mail/access

# Mailer table (overriding domains)
Kmailertable hash -o /etc/mail/mailertable

# Virtual user table (maps incoming users)
Kvirtuser hash -o /etc/mail/virtusertable

# Configuration version number
DZ8.16.1


###############
#   Options   #
###############

# strip message body to 7 bits on input?
O SevenBitInput=False

# 8-bit data handling
#O EightBitMode=pass8

# wait for alias file rebuild (default units: minutes)
O AliasWait=10

# location of alias file
O AliasFile=/etc/mail/aliases

# minimum number of free blocks on filesystem
O MinFreeBlocks=100

# maximum message size
#O MaxMessageSize=0

# substitution for space (blank) characters
O BlankSub=.

# avoid connecting to "expensive" mailers on initial submission?
O HoldExpensive=False

# checkpoint queue runs after every N successful deliveries
#O CheckpointInterval=10

# default delivery mode
O DeliveryMode=background

# error message header/file
#O ErrorHeader=/etc/mail/error-header

# error mode
#O ErrorMode=print

# save Unix-style "From_" lines at top of header?
#O SaveFromLine=False

# queue file mode (qf files)
#O QueueFileMode=0600

# temporary file mode
O TempFileMode=0600

# match recipients against GECOS field?
#O MatchGECOS=False

# maximum hop count
#O MaxHopCount=25

# location of help file
O HelpFile=/etc/mail/helpfile

# ignore dots as terminators in incoming messages?
#O IgnoreDots=False

# name resolver options
O ResolverOptions=WorkAroundBrokenAAAA

# deliver MIME-encapsulated error messages?
O SendMimeErrors=True

# Forward file search path
O ForwardPath=$z/.forward.$w+$h:$z/.forward+$h:$z/.forward.$w:$z/.forward

# open connection cache size
O ConnectionCacheSize=2

# open connection cache timeout
O ConnectionCacheTimeout=5m

# persistent host status directory
#O HostStatusDirectory=.hoststat

# single thread deliveries (requires HostStatusDirectory)?
#O SingleThreadDelivery=False

# use Errors-To: header?
O UseErrorsTo=False

# use compressed IPv6 address format?
#O UseCompressedIPv6Addresses

# log level
O LogLevel=9

# send to me too, even in an alias expansion?
#O MeToo=True

# verify RHS in newaliases?
O CheckAliases=False

# default messages to old style headers if no special punctuation?
O OldStyleHeaders=True

# SMTP daemon options

O DaemonPortOptions=Name=IPv4, Family=inet
O DaemonPortOptions=Name=IPv6, Family=inet6, Modifiers=O
O DaemonPortOptions=Port=587, Name=MSA, M=E

# SMTP client options

O ClientPortOptions=Family=inet6, Address=2603:3024:3f6:e1::100

# Modifiers to define {daemon_flags} for direct submissions
#O DirectSubmissionModifiers

# Use as mail submission program? See sendmail/SECURITY
#O UseMSP

# privacy flags
O PrivacyOptions=authwarnings,noexpn,novrfy

# who (if anyone) should get extra copies of error messages
#O PostmasterCopy=Postmaster

# slope of queue-only function
#O QueueFactor=600000

# limit on number of concurrent queue runners
#O MaxQueueChildren

# maximum number of queue-runners per queue-grouping with multiple queues
#O MaxRunnersPerQueue=1

# priority of queue runners (nice(3))
#O NiceQueueRun

# shall we sort the queue by hostname first?
#O QueueSortOrder=priority

# minimum time in queue before retry
#O MinQueueAge=30m

# maximum time in queue before retry (if > 0; only for exponential delay)
#O MaxQueueAge

# how many jobs can you process in the queue?
#O MaxQueueRunSize=0

# perform initial split of envelope without checking MX records
#O FastSplit=1

# queue directory
O QueueDirectory=/var/spool/mqueue

# key for shared memory; 0 to turn off, -1 to auto-select
#O SharedMemoryKey=0

# file to store auto-selected key for shared memory (SharedMemoryKey = -1)
#O SharedMemoryKeyFile

# timeouts (many of these)
#O Timeout.initial=5m
O Timeout.connect=1m
#O Timeout.aconnect=0s
#O Timeout.iconnect=5m
#O Timeout.helo=5m
#O Timeout.mail=10m
#O Timeout.rcpt=1h
#O Timeout.datainit=5m
#O Timeout.datablock=1h
#O Timeout.datafinal=1h
#O Timeout.rset=5m
#O Timeout.quit=2m
#O Timeout.misc=2m
O Timeout.command=2m
O Timeout.ident=0
#O Timeout.fileopen=60s
#O Timeout.control=2m
O Timeout.queuereturn=5d
#O Timeout.queuereturn.normal=5d
#O Timeout.queuereturn.urgent=2d
#O Timeout.queuereturn.non-urgent=7d
#O Timeout.queuereturn.dsn=5d
O Timeout.queuewarn=4h
#O Timeout.queuewarn.normal=4h
#O Timeout.queuewarn.urgent=1h
#O Timeout.queuewarn.non-urgent=12h
#O Timeout.queuewarn.dsn=4h
#O Timeout.hoststatus=30m
#O Timeout.resolver.retrans=5s
#O Timeout.resolver.retrans.first=5s
#O Timeout.resolver.retrans.normal=5s
#O Timeout.resolver.retry=4
#O Timeout.resolver.retry.first=4
#O Timeout.resolver.retry.normal=4
#O Timeout.lhlo=2m
#O Timeout.auth=10m
#O Timeout.starttls=1h

# time for DeliverBy; extension disabled if less than 0
#O DeliverByMin=0

# should we not prune routes in route-addr syntax addresses?
#O DontPruneRoutes=False

# queue up everything before forking?
O SuperSafe=True

# status file
O StatusFile=/var/log/sendmail.st

# 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
#O TimeZoneSpec=

# default UID (can be username or userid:groupid)
#O DefaultUser=mailnull

# list of locations of user database file (null means no lookup)
#O UserDatabaseSpec=/etc/mail/userdb

# fallback MX host
#O FallbackMXhost=fall.back.host.net

# fallback smart host
#O FallbackSmartHost=fall.back.host.net

# if we are the best MX host for a site, try it directly instead of config err
#O TryNullMXList=False

# load average at which we just queue messages
#O QueueLA=8

# load average at which we refuse connections
#O RefuseLA=12

# log interval when refusing connections for this long
#O RejectLogInterval=3h

# load average at which we delay connections; 0 means no limit
#O DelayLA=0

# maximum number of children we allow at one time
#O MaxDaemonChildren=0

# maximum number of new connections per second
#O ConnectionRateThrottle=0

# Width of the window 
#O ConnectionRateWindowSize=60s

# work recipient factor
#O RecipientFactor=30000

# deliver each queued job in a separate process?
#O ForkEachJob=False

# work class factor
#O ClassFactor=1800

# work time factor
#O RetryFactor=90000

# default character set
#O DefaultCharSet=unknown-8bit

# service switch file (name hardwired on Solaris, Ultrix, OSF/1, others)
#O ServiceSwitchFile=/etc/mail/service.switch

# hosts file (normally /etc/hosts)
#O HostsFile=/etc/hosts

# dialup line delay on connection failure
#O DialDelay=0s

# action to take if there are no recipients in the message
O NoRecipientAction=add-to-undisclosed

# chrooted environment for writing to files
#O SafeFileEnvironment

# are colons OK in addresses?
#O ColonOkInAddr=True

# shall I avoid expanding CNAMEs (violates protocols)?
#O DontExpandCnames=False

# SMTP initial login message (old $e macro)
O SmtpGreetingMessage=$j Sendmail $v/$Z; $b

# UNIX initial From header format (old $l macro)
O UnixFromLine=From $g $d

# From: lines that have embedded newlines are unwrapped onto one line
#O SingleLineFromHeader=False

# Allow HELO SMTP command that does not include a host name
#O AllowBogusHELO=False

# Characters to be quoted in a full name phrase (@,;:\()[] are automatic)
#O MustQuoteChars=.

# delimiter (operator) characters (old $o macro)
O OperatorChars=.:%@!^/[]+

# shall I avoid calling initgroups(3) because of high NIS costs?
#O DontInitGroups=False

# are group-writable :include: and .forward files (un)trustworthy?
# True (the default) means they are not trustworthy.
#O UnsafeGroupWrites=True


# where do errors that occur when sending errors get sent?
#O DoubleBounceAddress=postmaster

# issue temporary errors (4xy) instead of permanent errors (5xy)?
#O SoftBounce=False

# where to save bounces if all else fails
#O DeadLetterDrop=/var/tmp/dead.letter

# what user id do we assume for the majority of the processing?
#O RunAsUser=sendmail

# maximum number of recipients per SMTP envelope
#O MaxRecipientsPerMessage=0

# limit the rate recipients per SMTP envelope are accepted
# once the threshold number of recipients have been rejected
#O BadRcptThrottle=0


# shall we get local names from our installed interfaces?
#O DontProbeInterfaces=False

# Return-Receipt-To: header implies DSN request
#O RrtImpliesDsn=False

# override connection address (for testing)
#O ConnectOnlyTo=0.0.0.0

# Trusted user for file ownership and starting the daemon
#O TrustedUser=root

# Control socket for daemon management
#O ControlSocketName=/var/spool/mqueue/.control

# Maximum MIME header length to protect MUAs
#O MaxMimeHeaderLength=0/0

# Maximum length of the sum of all headers
O MaxHeadersLength=32768

# Maximum depth of alias recursion
#O MaxAliasRecursion=10

# location of pid file
#O PidFile=/var/run/sendmail.pid

# Prefix string for the process title shown on 'ps' listings
#O ProcessTitlePrefix=prefix

# Data file (df) memory-buffer file maximum size
#O DataFileBufferSize=4096

# Transcript file (xf) memory-buffer file maximum size
#O XscriptFileBufferSize=4096

# lookup type to find information about local mailboxes
#O MailboxDatabase=pw

# override compile time flag REQUIRES_DIR_FSYNC
#O RequiresDirfsync=true

# list of authentication mechanisms
#O AuthMechanisms=EXTERNAL GSSAPI KERBEROS_V4 DIGEST-MD5 CRAM-MD5

# Authentication realm
#O AuthRealm

# default authentication information for outgoing connections
#O DefaultAuthInfo=/etc/mail/default-auth-info

# SMTP AUTH flags
#O AuthOptions

# SMTP AUTH maximum encryption strength
#O AuthMaxBits

# SMTP STARTTLS server options
#O TLSSrvOptions

# SSL cipherlist
#O CipherList
# server side SSL options
#O ServerSSLOptions
# client side SSL options
#O ClientSSLOptions
# SSL Engine
#O SSLEngine
# Path to dynamic library for SSLEngine
#O SSLEnginePath
# TLS: fall back to clear text after handshake failure?
#O TLSFallbacktoClear

# Input mail filters
#O InputMailFilters


# CA directory
O CACertPath=/etc/mail/certs
# CA file
O CACertFile=/etc/mail/certs/cacert.pem
# Server Cert
O ServerCertFile=/etc/mail/certs/host.cert
# Server private key
O ServerKeyFile=/etc/mail/certs/host.key
# Client Cert
O ClientCertFile=/etc/mail/certs/host.cert
# Client private key
O ClientKeyFile=/etc/mail/certs/host.key
# File containing certificate revocation lists 
#O CRLFile
# Directory containing hashes pointing to certificate revocation status files
#O CRLPath
# DHParameters (only required if DSA/DH is used)
O DHParameters=/mnt/certs/dhparam2048.pem
# Random data source (required for systems without /dev/urandom under OpenSSL)
#O RandFile
# fingerprint algorithm (digest) to use for the presented cert
#O CertFingerprintAlgorithm
# enable DANE?
#O DANE=false

# Maximum number of "useless" commands before slowing down
#O MaxNOOPCommands=20

# Name to use for EHLO (defaults to $j)
#O HeloName



############################
# QUEUE GROUP DEFINITIONS  #
############################


###########################
#   Message precedences   #
###########################

Pfirst-class=0
Pspecial-delivery=100
Plist=-30
Pbulk=-60
Pjunk=-100

#####################
#   Trusted users   #
#####################

# this is equivalent to setting class "t"
#Ft/etc/mail/trusted-users
Troot
Tdaemon
Tuucp

#########################
#   Format of headers   #
#########################

H?P?Return-Path: <$g>
HReceived: $?sfrom $s $.$?_($?s$|from $.$_)
	$.$?{auth_type}(authenticated$?{auth_ssf} bits=${auth_ssf}$.)
	$.by $j ($v/$Z)$?r with $r$. id $i$?{tls_version}
	(version=${tls_version} cipher=${cipher} bits=${cipher_bits} verify=${verify})$.$?u
	for $u; $|;
	$.$b$?g
	(envelope-from $g)$.
H?D?Resent-Date: $a
H?D?Date: $a
H?F?Resent-From: $?x$x <$g>$|$g$.
H?F?From: $?x$x <$g>$|$g$.
H?x?Full-Name: $x
# 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
#####
######################################################################
######################################################################

############################################
###  Ruleset 3 -- Name Canonicalization  ###
############################################
Scanonify=3

# handle null input (translate to <@> special case)
R$@			$@ <@>

# strip group: syntax (not inside angle brackets!) and trailing semicolon
R$*			$: $1 <@>			mark addresses
R$* < $* > $* <@>	$: $1 < $2 > $3			unmark <addr>
R@ $* <@>		$: @ $1				unmark @host:...
R$* [ IPv6 : $+ ] <@>	$: $1 [ IPv6 : $2 ]		unmark IPv6 addr
R$* :: $* <@>		$: $1 :: $2			unmark node::addr
R:include: $* <@>	$: :include: $1			unmark :include:...
R$* : $* [ $* ]		$: $1 : $2 [ $3 ] <@>		remark if leading colon
R$* : $* <@>		$: $2				strip colon if marked
R$* <@>			$: $1				unmark
R$* ;			   $1				strip trailing semi
R$* < $+ :; > $*	$@ $2 :; <@>			catch <list:;>
R$* < $* ; >		   $1 < $2 >			bogus bracketed semi

# null input now results from list:; syntax
R$@			$@ :; <@>

# strip angle brackets -- note RFC733 heuristic to get innermost item
R$*			$: < $1 >			housekeeping <>
R$+ < $* >		   < $2 >			strip excess on left
R< $* > $+		   < $1 >			strip excess on right
R<>			$@ < @ >			MAIL FROM:<> case
R< $+ >			$: $1				remove housekeeping <>

# strip route address <@a,@b,@c:user@d> -> <user@d>
R@ $+ , $+		$2
R@ [ $* ] : $+		$2
R@ $+ : $+		$2

# find focus for list syntax
R $+ : $* ; @ $+	$@ $>Canonify2 $1 : $2 ; < @ $3 >	list syntax
R $+ : $* ;		$@ $1 : $2;			list syntax

# find focus for @ syntax addresses
R$+ @ $+		$: $1 < @ $2 >			focus on domain
R$+ < $+ @ $+ >		$1 $2 < @ $3 >			move gaze right
R$+ < @ $+ >		$@ $>Canonify2 $1 < @ $2 >	already canonical


# convert old-style addresses to a domain-based address
R$- ! $+		$@ $>Canonify2 $2 < @ $1 .UUCP >	resolve uucp names
R$+ . $- ! $+		$@ $>Canonify2 $3 < @ $1 . $2 >		domain uucps
R$+ ! $+		$@ $>Canonify2 $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$* @ $*		$@ $>Canonify2 $1 < @ $2 >	Insert < > and finish

# else we must be a local name
R$*			$@ $>Canonify2 $1


################################################
###  Ruleset 96 -- bottom half of ruleset 3  ###
################################################

SCanonify2=96

# handle special cases for local names
R$* < @ localhost > $*		$: $1 < @ $j . > $2		no domain at all
R$* < @ localhost . $m > $*	$: $1 < @ $j . > $2		local domain
R$* < @ localhost . UUCP > $*	$: $1 < @ $j . > $2		.UUCP domain

# check for IPv4/IPv6 domain literal
R$* < @ [ $+ ] > $*		$: $1 < @@ [ $2 ] > $3		mark [addr]
R$* < @@ $=w > $*		$: $1 < @ $j . > $3		self-literal
R$* < @@ $+ > $*		$@ $1 < @ $2 > $3		canon IP addr





# if really UUCP, handle it immediately

# try UUCP traffic as a local address
R$* < @ $+ . UUCP > $*		$: $1 < @ $[ $2 $] . UUCP . > $3
R$* < @ $+ . . UUCP . > $*	$@ $1 < @ $2 . > $3

# hostnames ending in class P are always canonical
R$* < @ $* $=P > $*		$: $1 < @ $2 $3 . > $4
R$* < @ $* $~P > $*		$: $&{daemon_flags} $| $1 < @ $2 $3 > $4
R$* CC $* $| $* < @ $+.$+ > $*	$: $3 < @ $4.$5 . > $6
R$* CC $* $| $*			$: $3
# pass to name server to make hostname canonical
R$* $| $* < @ $* > $*		$: $2 < @ $[ $3 $] > $4
R$* $| $*			$: $2

# local host aliases and pseudo-domains are always canonical
R$* < @ $=w > $*		$: $1 < @ $2 . > $3
R$* < @ $=M > $*		$: $1 < @ $2 . > $3
R$* < @ $={VirtHost} > $* 	$: $1 < @ $2 . > $3
R$* < @ $* . . > $*		$1 < @ $2 . > $3


##################################################
###  Ruleset 4 -- Final Output Post-rewriting  ###
##################################################
Sfinal=4

R$+ :; <@>		$@ $1 :				handle <list:;>
R$* <@>			$@				handle <> and list:;

# strip trailing dot off possibly canonical name
R$* < @ $+ . > $*	$1 < @ $2 > $3

# eliminate internal code
R$* < @ *LOCAL* > $*	$1 < @ $j > $2

# externalize local domain info
R$* < $+ > $*		$1 $2 $3			defocus
R@ $+ : @ $+ : $+	@ $1 , @ $2 : $3		<route-addr> canonical
R@ $*			$@ @ $1				... and exit

# 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 @ $2				u%host@host => u@host



##############################################################
###   Ruleset 97 -- recanonicalize and call ruleset zero   ###
###		   (used for recursive calls)		   ###
##############################################################

SRecurse=97
R$*			$: $>canonify $1
R$*			$@ $>parse $1


######################################
###   Ruleset 0 -- Parse Address   ###
######################################

Sparse=0

R$*			$: $>Parse0 $1		initial parsing
R<@>			$#local $: <@>		special case error msgs
R$*			$: $>ParseLocal $1	handle local hacks
R$*			$: $>Parse1 $1		final parsing

#
#  Parse0 -- do initial syntax checking and eliminate local addresses.
#	This should either return with the (possibly modified) input
#	or return with a #error mailer.  It should not return with a
#	#mailer other than the #error mailer.
#

SParse0
R<@>			$@ <@>			special case error msgs
R$* : $* ; <@>		$#error $@ 5.1.3 $: "553 List:; syntax illegal for recipient addresses"
R@ <@ $* >		< @ $1 >		catch "@@host" bogosity
R<@ $+>			$#error $@ 5.1.3 $: "553 User address required"
R$+ <@>			$#error $@ 5.1.3 $: "553 Hostname required"
R$*			$: <> $1
R<> $* < @ [ $* ] : $+ > $*	$1 < @ [ $2 ] : $3 > $4
R<> $* < @ [ $* ] , $+ > $*	$1 < @ [ $2 ] , $3 > $4
R<> $* < @ [ $* ] $+ > $*	$#error $@ 5.1.2 $: "553 Invalid address"
R<> $* < @ [ $+ ] > $*		$1 < @ [ $2 ] > $3
R<> $* <$* : $* > $*	$#error $@ 5.1.3 $: "553 Colon illegal in host name part"
R<> $*			$1
R$* < @ . $* > $*	$#error $@ 5.1.2 $: "553 Invalid host name"
R$* < @ $* .. $* > $*	$#error $@ 5.1.2 $: "553 Invalid host name"
R$* < @ $* @ > $*	$#error $@ 5.1.2 $: "553 Invalid route address"
R$* @ $* < @ $* > $*	$#error $@ 5.1.3 $: "553 Invalid route address"
R$* , $~O $*		$#error $@ 5.1.3 $: "553 Invalid route address"


# now delete the local info -- note $=O to find characters that cause forwarding
R$* < @ > $*		$@ $>Parse0 $>canonify $1	user@ => user
R< @ $=w . > : $*	$@ $>Parse0 $>canonify $2	@here:... -> ...
R$- < @ $=w . >		$: $(dequote $1 $) < @ $2 . >	dequote "foo"@here
R< @ $+ >		$#error $@ 5.1.3 $: "553 User address required"
R$* $=O $* < @ $=w . >	$@ $>Parse0 $>canonify $1 $2 $3	...@here -> ...
R$- 			$: $(dequote $1 $) < @ *LOCAL* >	dequote "foo"
R< @ *LOCAL* >		$#error $@ 5.1.3 $: "553 User address required"
R$* $=O $* < @ *LOCAL* >
			$@ $>Parse0 $>canonify $1 $2 $3	...@*LOCAL* -> ...
R$* < @ *LOCAL* >	$: $1


#
#  Parse1 -- the bottom half of ruleset 0.
#

SParse1

# handle numeric address spec
R$* < @ [ $+ ] > $*	$: $>ParseLocal $1 < @ [ $2 ] > $3	numeric internet spec
R$* < @ [ $+ ] > $*	$: $1 < @ [ $2 ] : $S > $3	Add smart host to path
R$* < @ [ $+ ] : > $*		$#esmtp $@ [$2] $: $1 < @ [$2] > $3	no smarthost: send
R$* < @ [ $+ ] : $- : $*> $*	$#$3 $@ $4 $: $1 < @ [$2] > $5	smarthost with mailer
R$* < @ [ $+ ] : $+ > $*	$#esmtp $@ $3 $: $1 < @ [$2] > $4	smarthost without mailer

# handle virtual users
R$+			$: <!> $1		Mark for lookup
R<!> $+ < @ $={VirtHost} . > 	$: < $(virtuser $1 @ $2 $@ $1 $: @ $) > $1 < @ $2 . >
R<!> $+ < @ $=w . > 	$: < $(virtuser $1 @ $2 $@ $1 $: @ $) > $1 < @ $2 . >
R<@> $+ + $+ < @ $* . >
			$: < $(virtuser $1 + + @ $3 $@ $1 $@ $2 $@ +$2 $: @ $) > $1 + $2 < @ $3 . >
R<@> $+ + $* < @ $* . >
			$: < $(virtuser $1 + * @ $3 $@ $1 $@ $2 $@ +$2 $: @ $) > $1 + $2 < @ $3 . >
R<@> $+ + $* < @ $* . >
			$: < $(virtuser $1 @ $3 $@ $1 $@ $2 $@ +$2 $: @ $) > $1 + $2 < @ $3 . >
R<@> $+ + $+ < @ $+ . >	$: < $(virtuser + + @ $3 $@ $1 $@ $2 $@ +$2 $: @ $) > $1 + $2 < @ $3 . >
R<@> $+ + $* < @ $+ . >	$: < $(virtuser + * @ $3 $@ $1 $@ $2 $@ +$2 $: @ $) > $1 + $2 < @ $3 . >
R<@> $+ + $* < @ $+ . >	$: < $(virtuser @ $3 $@ $1 $@ $2 $@ +$2 $: ! $) > $1 + $2 < @ $3 . >
R<@> $+ < @ $+ . >	$: < $(virtuser @ $2 $@ $1 $: @ $) > $1 < @ $2 . >
R<@> $+			$: $1
R<!> $+			$: $1
R< error : $-.$-.$- : $+ > $* 	$#error $@ $1.$2.$3 $: $4
R< error : $- $+ > $* 	$#error $@ $(dequote $1 $) $: $2
R< $+ > $+ < @ $+ >	$: $>Recurse $1

# short circuit local delivery so forwarded email works


R$=L < @ $=w . >	$#local $: @ $1			special local names
R$+ < @ $=w . >		$#local $: $1			regular local name

# 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< $~[ : $* > $* 	$>MailerToTriple < $1 : $2 > $3		check -- resolved?
R< $+ > $*		$: $>Mailertable <$1> $2		try domain

# resolve remotely connected UUCP links (if any)

# resolve fake top level domains by forwarding to other hosts



# pass names that still have a host to a smarthost (if defined)
R$* < @ $* > $*		$: $>MailerToTriple < $S > $1 < @ $2 > $3	glue on smarthost name

# deal with other remote names
R$* < @$* > $*		$#esmtp $@ $2 $: $1 < @ $2 > $3	user@host.domain

# 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   ###
###########################################################################

SLocal_localaddr
Slocaladdr=5
R$+			$: $1 $| $>"Local_localaddr" $1
R$+ $| $#ok		$@ $1			no change
R$+ $| $#$*		$#$2
R$+ $| $*		$: $1




# deal with plussed users so aliases work nicely
R$+ + *			$#local $@ $&h $: $1
R$+ + $*		$#local $@ + $2 $: $1 + *

# prepend an empty "forward host" on the front
R$+			$: <> $1



R< > $+			$: < > < $1 <> $&h >		nope, restore +detail

R< > < $+ <> + $* >	$: < > < $1 + $2 >		check whether +detail
R< > < $+ <> $* >	$: < > < $1 >			else discard
R< > < $+ + $* > $*	   < > < $1 > + $2 $3		find the user part
R< > < $+ > + $*	$#local $@ $2 $: @ $1		strip the extra +
R< > < $+ >		$@ $1				no +detail
R$+			$: $1 <> $&h			add +detail back in

R$+ <> + $*		$: $1 + $2			check whether +detail
R$+ <> $*		$: $1				else discard
R< local : $* > $*	$: $>MailerToTriple < local : $1 > $2	no host extension
R< error : $* > $*	$: $>MailerToTriple < error : $1 > $2	no host extension

R< $~[ : $+ > $+	$: $>MailerToTriple < $1 : $2 > $3 < @ $2 >

R< $+ > $+		$@ $>MailerToTriple < $1 > $2 < @ $1 >


###################################################################
###  Ruleset 90 -- try domain part of mailertable entry 	###
###################################################################

SMailertable=90
R$* <$- . $+ > $*	$: $1$2 < $(mailertable .$3 $@ $1$2 $@ $2 $) > $4
R$* <$~[ : $* > $*	$>MailerToTriple < $2 : $3 > $4		check -- resolved?
R$* < . $+ > $* 	$@ $>Mailertable $1 . <$2> $3		no -- strip & try again
R$* < $* > $*		$: < $(mailertable . $@ $1$2 $) > $3	try "."
R< $~[ : $* > $*	$>MailerToTriple < $1 : $2 > $3		"." found?
R< $* > $*		$@ $2				no mailertable match

###################################################################
###  Ruleset 95 -- canonify mailer:[user@]host syntax to triple	###
###################################################################

SMailerToTriple=95
R< > $*				$@ $1			strip off null relay
R< error : $-.$-.$- : $+ > $* 	$#error $@ $1.$2.$3 $: $4
R< error : $- : $+ > $*		$#error $@ $(dequote $1 $) $: $2
R< error : $+ > $*		$#error $: $1
R< local : $* > $*		$>CanonLocal < $1 > $2
R< $~[ : $+ @ $+ > $*<$*>$*	$# $1 $@ $3 $: $2<@$3>	use literal user
R< $~[ : $+ > $*		$# $1 $@ $2 $: $3	try qualified mailer
R< $=w > $*			$@ $2			delete local host
R< $+ > $*			$#relay $@ $1 $: $2	use unqualified mailer

###################################################################
###  Ruleset CanonLocal -- canonify local: syntax		###
###################################################################

SCanonLocal
# strip local host from routed addresses
R< $* > < @ $+ > : $+		$@ $>Recurse $3
R< $* > $+ $=O $+ < @ $+ >	$@ $>Recurse $2 $3 $4

# strip trailing dot from any host name that may appear
R< $* > $* < @ $* . >		$: < $1 > $2 < @ $3 >

# handle local: syntax -- use old user, either with or without host
R< > $* < @ $* > $*		$#local $@ $1@$2 $: $1
R< > $+				$#local $@ $1    $: $1

# handle local:user@host syntax -- ignore host part
R< $+ @ $+ > $* < @ $* >	$: < $1 > $3 < @ $4 >

# handle local:user syntax
R< $+ > $* <@ $* > $*		$#local $@ $2@$3 $: $1
R< $+ > $* 			$#local $@ $2    $: $1

###################################################################
###  Ruleset 93 -- convert header names to masqueraded form	###
###################################################################

SMasqHdr=93


# do not masquerade anything in class N
R$* < @ $* $=N . >	$@ $1 < @ $2 $3 . >

R$* < @ *LOCAL* >	$@ $1 < @ $j . >

###################################################################
###  Ruleset 94 -- convert envelope names to masqueraded form	###
###################################################################

SMasqEnv=94
R$* < @ *LOCAL* > $*	$: $1 < @ $j . > $2

###################################################################
###  Ruleset 98 -- local part of ruleset zero (can be null)	###
###################################################################

SParseLocal=98

# addresses sent to foo@host.REDIRECT will give a 551 error code
R$* < @ $+ .REDIRECT. >		$: $1 < @ $2 . REDIRECT . > < ${opMode} >
R$* < @ $+ .REDIRECT. > <i>	$: $1 < @ $2 . REDIRECT. >
R$* < @ $+ .REDIRECT. > < $- >	$#error $@ 5.1.1 $: "551 User has moved; please try " <$1@$2>






######################################################################
###  D: LookUpDomain -- search for domain in access database
###
###	Parameters:
###		<$1> -- key (domain name)
###		<$2> -- default (what to return if not found in db)
###		<$3> -- mark (must be <(!|+) single-token>)
###			! does lookup only with tag
###			+ does lookup with and without tag
###		<$4> -- passthru (additional data passed unchanged through)
######################################################################

SD
R<$*> <$+> <$- $-> <$*>		$: < $(access $4:$1 $: ? $) > <$1> <$2> <$3 $4> <$5>
R<?> <$+> <$+> <+ $-> <$*>	$: < $(access $1 $: ? $) > <$1> <$2> <+ $3> <$4>
R<?> <[$+.$-]> <$+> <$- $-> <$*>	$@ $>D <[$1]> <$3> <$4 $5> <$6>
R<?> <[$+::$-]> <$+> <$- $-> <$*>	$: $>D <[$1]> <$3> <$4 $5> <$6>
R<?> <[$+:$-]> <$+> <$- $-> <$*>	$: $>D <[$1]> <$3> <$4 $5> <$6>
R<?> <$+.$+> <$+> <$- $-> <$*>	$@ $>D <$2> <$3> <$4 $5> <$6>
R<?> <$+> <$+> <$- $-> <$*>	$@ <$2> <$5>
R<$* <TMPF>> <$+> <$+> <$- $-> <$*>	$@ <<TMPF>> <$6>
R<$*> <$+> <$+> <$- $-> <$*>	$@ <$1> <$6>

######################################################################
###  A: LookUpAddress -- search for host address in access database
###
###	Parameters:
###		<$1> -- key (dot quadded host address)
###		<$2> -- default (what to return if not found in db)
###		<$3> -- mark (must be <(!|+) single-token>)
###			! does lookup only with tag
###			+ does lookup with and without tag
###		<$4> -- passthru (additional data passed through)
######################################################################

SA
R<$+> <$+> <$- $-> <$*>		$: < $(access $4:$1 $: ? $) > <$1> <$2> <$3 $4> <$5>
R<?> <$+> <$+> <+ $-> <$*>	$: < $(access $1 $: ? $) > <$1> <$2> <+ $3> <$4>
R<?> <$+::$-> <$+> <$- $-> <$*>		$@ $>A <$1> <$3> <$4 $5> <$6>
R<?> <$+:$-> <$+> <$- $-> <$*>		$@ $>A <$1> <$3> <$4 $5> <$6>
R<?> <$+.$-> <$+> <$- $-> <$*>		$@ $>A <$1> <$3> <$4 $5> <$6>
R<?> <$+> <$+> <$- $-> <$*>	$@ <$2> <$5>
R<$* <TMPF>> <$+> <$+> <$- $-> <$*>	$@ <<TMPF>> <$6>
R<$*> <$+> <$+> <$- $-> <$*>	$@ <$1> <$6>

######################################################################
###  CanonAddr --	Convert an address into a standard form for
###			relay checking.  Route address syntax is
###			crudely converted into a %-hack address.
###
###	Parameters:
###		$1 -- full recipient address
###
###	Returns:
###		parsed address, not in source route form
######################################################################

SCanonAddr
R$*			$: $>Parse0 $>canonify $1	make domain canonical


######################################################################
###  ParseRecipient --	Strip off hosts in $=R as well as possibly
###			$* $=m or the access database.
###			Check user portion for host separators.
###
###	Parameters:
###		$1 -- full recipient address
###
###	Returns:
###		parsed, non-local-relaying address
######################################################################

SParseRecipient
R$*				$: <?> $>CanonAddr $1
R<?> $* < @ $* . >		<?> $1 < @ $2 >			strip trailing dots
R<?> $- < @ $* >		$: <?> $(dequote $1 $) < @ $2 >	dequote local part

# if no $=O character, no host in the user portion, we are done
R<?> $* $=O $* < @ $* >		$: <NO> $1 $2 $3 < @ $4>
R<?> $*				$@ $1


R<NO> $* < @ $* $=R >		$: <RELAY> $1 < @ $2 $3 >
R<NO> $* < @ $+ >		$: $>D <$2> <NO> <+ To> <$1 < @ $2 >>
R<$+> <$+>			$: <$1> $2



R<RELAY> $* < @ $* >		$@ $>ParseRecipient $1
R<$+> $*			$@ $2


######################################################################
###  check_relay -- check hostname/address on SMTP startup
######################################################################



SLocal_check_relay
Scheck_relay
R$*			$: $1 $| $>"Local_check_relay" $1
R$* $| $* $| $#$*	$#$3
R$* $| $* $| $*		$@ $>"Basic_check_relay" $1 $| $2

SBasic_check_relay
# check for deferred delivery mode
R$*			$: < $&{deliveryMode} > $1
R< d > $*		$@ deferred
R< $* > $*		$: $2

R$+ $| $+		$: $>D < $1 > <?> <+ Connect> < $2 >
R   $| $+		$: $>A < $1 > <?> <+ Connect> <>	empty client_name
R<?> <$+>		$: $>A < $1 > <?> <+ Connect> <>	no: another lookup
R<?> <$*>		$: OK				found nothing
R<$={Accept}> <$*>	$@ $1				return value of lookup
R<REJECT> <$*>		$#error $@ 5.7.1 $: "550 Access denied"
R<DISCARD> <$*>		$#discard $: discard
R<QUARANTINE:$+> <$*>	$#error $@ quarantine $: $1
R<ERROR:$-.$-.$-:$+> <$*>	$#error $@ $1.$2.$3 $: $4
R<ERROR:$+> <$*>		$#error $: $1
R<$* <TMPF>> <$*>		$#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<$+> <$*>		$#error $: $1


######################################################################
###  check_mail -- check SMTP `MAIL FROM:' command argument
######################################################################

SLocal_check_mail
Scheck_mail
R$*			$: $1 $| $>"Local_check_mail" $1
R$* $| $#$*		$#$2
R$* $| $*		$@ $>"Basic_check_mail" $1

SBasic_check_mail
# check for deferred delivery mode
R$*			$: < $&{deliveryMode} > $1
R< d > $*		$@ deferred
R< $* > $*		$: $2

# authenticated?
R$*			$: $1 $| $>"tls_client" $&{verify} $| MAIL
R$* $| $#$+		$#$2
R$* $| $*		$: $1

R<>			$@ <OK>			we MUST accept <> (RFC 1123)
R$+			$: <?> $1
R<?><$+>		$: <@> <$1>
R<?>$+			$: <@> <$1>
R$*			$: $&{daemon_flags} $| $1
R$* f $* $| <@> < $* @ $- >	$: < ? $&{client_name} > < $3 @ $4 >
R$* u $* $| <@> < $* >	$: <?> < $3 >
R$* $| $*		$: $2
# handle case of @localhost on address
R<@> < $* @ localhost >	$: < ? $&{client_name} > < $1 @ localhost >
R<@> < $* @ [127.0.0.1] >
			$: < ? $&{client_name} > < $1 @ [127.0.0.1] >
R<@> < $* @ [IPv6:0:0:0:0:0:0:0:1] >
			$: < ? $&{client_name} > < $1 @ [IPv6:0:0:0:0:0:0:0:1] >
R<@> < $* @ [IPv6:::1] >
			$: < ? $&{client_name} > < $1 @ [IPv6:::1] >
R<@> < $* @ localhost.$m >
			$: < ? $&{client_name} > < $1 @ localhost.$m >
R<@> < $* @ localhost.UUCP >
			$: < ? $&{client_name} > < $1 @ localhost.UUCP >
R<@> $*			$: $1			no localhost as domain
R<? $=w> $*		$: $2			local client: ok
R<? $+> <$+>		$#error $@ 5.5.4 $: "553 Real domain name required for sender address"
R<?> $*			$: $1
R$*			$: <?> $>CanonAddr $1		canonify sender address and mark it
R<?> $* < @ $+ . >	<?> $1 < @ $2 >			strip trailing dots
# handle non-DNS hostnames (*.bitnet, *.decnet, *.uucp, etc)
R<?> $* < @ $* $=P >	$: <OKR> $1 < @ $2 $3 >
R<?> $* < @ $j >	$: <OKR> $1 < @ $j >
R<?> $* < @ $+ >	$: <? $(resolve $2 $: $2 <PERM> $) > $1 < @ $2 >
R<? $* <$->> $* < @ $+ >
			$: <$2> $3 < @ $4 >

# check sender address: user@address, user@, address
R<$+> $+ < @ $* >	$: @<$1> <$2 < @ $3 >> $| <F:$2@$3> <U:$2@> <D:$3>
R<$+> $+		$: @<$1> <$2> $| <U:$2@>
R@ <$+> <$*> $| <$+>	$: <@> <$1> <$2> $| $>SearchList <+ From> $| <$3> <>
R<@> <$+> <$*> $| <$*>	$: <$3> <$1> <$2>		reverse result
# retransform for further use
R<?> <$+> <$*>		$: <$1> $2	no match
R<$+> <$+> <$*>		$: <$1> $3	relevant result, keep it

# handle case of no @domain on address
R<?> $*			$: $&{daemon_flags} $| <?> $1
R$* u $* $| <?> $*	$: <OKR> $3
R$* $| $*		$: $2
R<?> $*			$: < ? $&{client_addr} > $1
R<?> $*			$@ <OKR>			...local unqualed ok
R<? $+> $*		$#error $@ 5.5.4 $: "553 Domain name required for sender address " $&f
							...remote is not
# check results
R<?> $*			$: @ $1		mark address: nothing known about it
R<$={ResOk}> $*		$: @ $2		domain ok
R<TEMP> $*		$#error $@ 4.1.8 $: "451 Domain of sender address " $&f " does not resolve"
R<PERM> $*		$#error $@ 5.1.8 $: "553 Domain of sender address " $&f " does not exist"
R<$={Accept}> $*	$# $1		accept from access map
R<DISCARD> $*		$#discard $: discard
R<QUARANTINE:$+> $*	$#error $@ quarantine $: $1
R<REJECT> $*		$#error $@ 5.7.1 $: "550 Access denied"
R<ERROR:$-.$-.$-:$+> $*		$#error $@ $1.$2.$3 $: $4
R<ERROR:$+> $*		$#error $: $1
R<<TMPF>> $*		$#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<$+> $*		$#error $: $1		error from access db



######################################################################
###  check_rcpt -- check SMTP `RCPT TO:' command argument
######################################################################

SLocal_check_rcpt
Scheck_rcpt
R$*			$: $1 $| $>"Local_check_rcpt" $1
R$* $| $#$*		$#$2
R$* $| $*		$@ $>"Basic_check_rcpt" $1

SBasic_check_rcpt
# empty address?
R<>			$#error $@ nouser $: "553 User address required"
R$@			$#error $@ nouser $: "553 User address required"
# check for deferred delivery mode
R$*			$: < $&{deliveryMode} > $1
R< d > $*		$@ deferred
R< $* > $*		$: $2


######################################################################
R$*			$: $1 $| @ $>"Rcpt_ok" $1
R$* $| @ $#TEMP $+	$: $1 $| T $2
R$* $| @ $#$*		$#$2
R$* $| @ RELAY		$@ RELAY
R$* $| @ $*		$: O $| $>"Relay_ok" $1
R$* $| T $+		$: T $2 $| $>"Relay_ok" $1
R$* $| $#TEMP $+	$#error $2
R$* $| $#$*		$#$2
R$* $| RELAY		$@ RELAY
R T $+ $| $*		$#error $1
# anything else is bogus
R$*			$#error $@ 5.7.1 $: "550 Relaying denied"


######################################################################
### Rcpt_ok: is the recipient ok?
######################################################################
SRcpt_ok
R$*			$: $>ParseRecipient $1		strip relayable hosts



# blocklist local users or any host from receiving mail
R$*			$: <?> $1
R<?> $+ < @ $=w >	$: <> <$1 < @ $2 >> $| <F:$1@$2> <U:$1@> <D:$2>
R<?> $+ < @ $* >	$: <> <$1 < @ $2 >> $| <F:$1@$2> <D:$2>
R<?> $+			$: <> <$1> $| <U:$1@>
R<> <$*> $| <$+>	$: <@> <$1> $| $>SearchList <+ To> $| <$2> <>
R<@> <$*> $| <$*>	$: <$2> <$1>		reverse result
R<?> <$*>		$: @ $1		mark address as no match
R<$={Accept}> <$*>	$: @ $2		mark address as no match

R<REJECT> $*		$#error $@ 5.2.1 $: "550 Mailbox disabled for this recipient"
R<DISCARD> $*		$#discard $: discard
R<QUARANTINE:$+> $*	$#error $@ quarantine $: $1
R<ERROR:$-.$-.$-:$+> $*		$#error $@ $1.$2.$3 $: $4
R<ERROR:$+> $*		$#error $: $1
R<<TMPF>> $*		$#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<$+> $*		$#error $: $1		error from access db
R@ $*			$1		remove mark

# authenticated via TLS?
R$*			$: $1 $| $>RelayTLS	client authenticated?
R$* $| $# $+		$# $2			error/ok?
R$* $| $*		$: $1			no

R$*			$: $1 $| $>"Local_Relay_Auth" $&{auth_type}
R$* $| $# $*		$# $2
R$* $| NO		$: $1
R$* $| $*		$: $1 $| $&{auth_type}
R$* $|			$: $1
R$* $| $={TrustAuthMech}	$# RELAY
R$* $| $*		$: $1
# anything terminating locally is ok
R$+ < @ $=w >		$@ RELAY
R$+ < @ $* $=R >	$@ RELAY
R$+ < @ $+ >		$: $>D <$2> <?> <+ To> <$1 < @ $2 >>
R<RELAY> $*		$@ RELAY
R<$* <TMPF>> $*		$#TEMP $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<$*> <$*>		$: $2



# check for local user (i.e. unqualified address)
R$*			$: <?> $1
R<?> $* < @ $+ >	$: <REMOTE> $1 < @ $2 >
# local user is ok
R<?> $+			$@ RELAY
R<$+> $*		$: $2

######################################################################
### Relay_ok: is the relay/sender ok?
######################################################################
SRelay_ok
# anything originating locally is ok
# check IP address
R$*			$: $&{client_addr}
R$@			$@ RELAY		originated locally
R0			$@ RELAY		originated locally
R127.0.0.1		$@ RELAY		originated locally
RIPv6:0:0:0:0:0:0:0:1	$@ RELAY		originated locally
RIPv6:::1		$@ RELAY		originated locally
R$=R $*			$@ RELAY		relayable IP address
R$*			$: $>A <$1> <?> <+ Connect> <$1>
R<RELAY> $* 		$@ RELAY		relayable IP address

R<<TMPF>> $*		$#TEMP $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<$*> <$*>		$: $2
R$*			$: [ $1 ]		put brackets around it...
R$=w			$@ RELAY		... and see if it is local


# check client name: first: did it resolve?
R$*			$: < $&{client_resolve} >
R<TEMP>			$#TEMP $@ 4.4.0 $: "450 Relaying temporarily denied. Cannot resolve PTR record for " $&{client_addr}
R<FORGED>		$#error $@ 5.7.1 $: "550 Relaying denied. IP name possibly forged " $&{client_name}
R<FAIL>			$#error $@ 5.7.1 $: "550 Relaying denied. IP name lookup failed " $&{client_name}
R$*			$: <@> $&{client_name}
# pass to name server to make hostname canonical
R<@> $* $=P 		$:<?>  $1 $2
R<@> $+			$:<?>  $[ $1 $]
R$* .			$1			strip trailing dots
R<?> $=w		$@ RELAY
R<?> $* $=R			$@ RELAY
R<?> $*			$: $>D <$1> <?> <+ Connect> <$1>
R<RELAY> $*		$@ RELAY
R<$* <TMPF>> $*		$#TEMP $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<$*> <$*>		$: $2



######################################################################
###  F: LookUpFull -- search for an entry in access database
###
###	lookup of full key (which should be an address) and
###	variations if +detail exists: +* and without +detail
###
###	Parameters:
###		<$1> -- key
###		<$2> -- default (what to return if not found in db)
###		<$3> -- mark (must be <(!|+) single-token>)
###			! does lookup only with tag
###			+ does lookup with and without tag
###		<$4> -- passthru (additional data passed unchanged through)
######################################################################

SF
R<$+> <$*> <$- $-> <$*>		$: <$(access $4:$1 $: ? $)> <$1> <$2> <$3 $4> <$5>
R<?> <$+> <$*> <+ $-> <$*>	$: <$(access $1 $: ? $)> <$1> <$2> <+ $3> <$4>
R<?> <$+ + $* @ $+> <$*> <$- $-> <$*>
			$: <$(access $6:$1+*@$3 $: ? $)> <$1+$2@$3> <$4> <$5 $6> <$7>
R<?> <$+ + $* @ $+> <$*> <+ $-> <$*>
			$: <$(access $1+*@$3 $: ? $)> <$1+$2@$3> <$4> <+ $5> <$6>
R<?> <$+ + $* @ $+> <$*> <$- $-> <$*>
			$: <$(access $6:$1@$3 $: ? $)> <$1+$2@$3> <$4> <$5 $6> <$7>
R<?> <$+ + $* @ $+> <$*> <+ $-> <$*>
			$: <$(access $1@$3 $: ? $)> <$1+$2@$3> <$4> <+ $5> <$6>
R<?> <$+> <$*> <$- $-> <$*>	$@ <$2> <$5>
R<$+ <TMPF>> <$*> <$- $-> <$*>	$@ <<TMPF>> <$5>
R<$+> <$*> <$- $-> <$*>		$@ <$1> <$5>

######################################################################
###  E: LookUpExact -- search for an entry in access database
###
###	Parameters:
###		<$1> -- key
###		<$2> -- default (what to return if not found in db)
###		<$3> -- mark (must be <(!|+) single-token>)
###			! does lookup only with tag
###			+ does lookup with and without tag
###		<$4> -- passthru (additional data passed unchanged through)
######################################################################

SE
R<$*> <$*> <$- $-> <$*>		$: <$(access $4:$1 $: ? $)> <$1> <$2> <$3 $4> <$5>
R<?> <$+> <$*> <+ $-> <$*>	$: <$(access $1 $: ? $)> <$1> <$2> <+ $3> <$4>
R<?> <$+> <$*> <$- $-> <$*>	$@ <$2> <$5>
R<$+ <TMPF>> <$*> <$- $-> <$*>	$@ <<TMPF>> <$5>
R<$+> <$*> <$- $-> <$*>		$@ <$1> <$5>

######################################################################
###  U: LookUpUser -- search for an entry in access database
###
###	lookup of key (which should be a local part) and
###	variations if +detail exists: +* and without +detail
###
###	Parameters:
###		<$1> -- key (user@)
###		<$2> -- default (what to return if not found in db)
###		<$3> -- mark (must be <(!|+) single-token>)
###			! does lookup only with tag
###			+ does lookup with and without tag
###		<$4> -- passthru (additional data passed unchanged through)
######################################################################

SU
R<$+> <$*> <$- $-> <$*>		$: <$(access $4:$1 $: ? $)> <$1> <$2> <$3 $4> <$5>
R<?> <$+> <$*> <+ $-> <$*>	$: <$(access $1 $: ? $)> <$1> <$2> <+ $3> <$4>
R<?> <$+ + $* @> <$*> <$- $-> <$*>
			$: <$(access $5:$1+*@ $: ? $)> <$1+$2@> <$3> <$4 $5> <$6>
R<?> <$+ + $* @> <$*> <+ $-> <$*>
			$: <$(access $1+*@ $: ? $)> <$1+$2@> <$3> <+ $4> <$5>
R<?> <$+ + $* @> <$*> <$- $-> <$*>
			$: <$(access $5:$1@ $: ? $)> <$1+$2@> <$3> <$4 $5> <$6>
R<?> <$+ + $* @> <$*> <+ $-> <$*>
			$: <$(access $1@ $: ? $)> <$1+$2@> <$3> <+ $4> <$5>
R<?> <$+> <$*> <$- $-> <$*>	$@ <$2> <$5>
R<$+ <TMPF>> <$*> <$- $-> <$*>	$@ <<TMPF>> <$5>
R<$+> <$*> <$- $-> <$*>		$@ <$1> <$5>

######################################################################
###  SearchList: search a list of items in the access map
###	Parameters:
###		<exact tag> $| <mark:address> <mark:address> ... <>
###	where "exact" is either "+" or "!":
###	<+ TAG>	lookup with and w/o tag
###	<! TAG>	lookup with tag
###	possible values for "mark" are:
###		D: recursive host lookup (LookUpDomain)
###		E: exact lookup, no modifications
###		F: full lookup, try user+ext@domain and user@domain
###		U: user lookup, try user+ext and user (input must have trailing @)
###	return: <RHS of lookup> or <?> (not found)
######################################################################

# class with valid marks for SearchList
C{Src}E F D U 
SSearchList
# just call the ruleset with the name of the tag... nice trick...
R<$+> $| <$={Src}:$*> <$*>	$: <$1> $| <$4> $| $>$2 <$3> <?> <$1> <>
R<$+> $| <> $| <?> <>		$@ <?>
R<$+> $| <$+> $| <?> <>		$@ $>SearchList <$1> $| <$2>
R<$+> $| <$*> $| <$+> <>	$@ <$3>
R<$+> $| <$+>			$@ <$2>


######################################################################
###  trust_auth: is user trusted to authenticate as someone else?
###
###	Parameters:
###		$1: AUTH= parameter from MAIL command
######################################################################

SLocal_trust_auth
Strust_auth
R$*			$: $&{auth_type} $| $1
# required by RFC 2554 section 4.
R$@ $| $*		$#error $@ 5.7.1 $: "550 not authenticated"
R$* $| $&{auth_authen}		$@ identical
R$* $| <$&{auth_authen}>	$@ identical
R$* $| $*		$: $1 $| $>"Local_trust_auth" $2
R$* $| $#$*		$#$2
R$*			$#error $@ 5.7.1 $: "550 " $&{auth_authen} " not allowed to act as " $&{auth_author}

######################################################################
###  Relay_Auth: allow relaying based on authentication?
###
###	Parameters:
###		$1: ${auth_type}
######################################################################
SLocal_Relay_Auth

######################################################################
###  srv_features: which features to offer to a client?
###	(done in server)
######################################################################
Ssrv_features
R$*		$: $>D <$&{client_name}> <?> <! "Srv_Features"> <>
R<?>$*		$: $>A <$&{client_addr}> <?> <! "Srv_Features"> <>
R<?>$*		$: <$(access "Srv_Features": $: ? $)>
R<?>$*		$@ OK
R<$* <TMPF>>$*	$#temp
R<$+>$*		$# $1

######################################################################
###  try_tls: try to use STARTTLS?
###	(done in client)
######################################################################
Stry_tls
R$*		$: $>D <$&{server_name}> <?> <! "Try_TLS"> <>
R<?>$*		$: $>A <$&{server_addr}> <?> <! "Try_TLS"> <>
R<?>$*		$: <$(access "Try_TLS": $: ? $)>
R<?>$*		$@ OK
R<$* <TMPF>>$*	$#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<NO>$*		$#error $@ 5.7.1 $: "550 do not try TLS with " $&{server_name} " ["$&{server_addr}"]"

######################################################################
###  tls_rcpt: is connection with server "good" enough?
###	(done in client, per recipient)
###
###	Parameters:
###		$1: recipient
######################################################################
Stls_rcpt
R$*			$: $(macro {TLS_Name} $@ $&{server_name} $) $1
R$+			$: <?> $>CanonAddr $1
R<?> $+ < @ $+ . >	<?> $1 <@ $2 >
R<?> $+ < @ $+ >	$: $1 <@ $2 > $| <F:$1@$2> <U:$1@> <D:$2> <E:>
R<?> $+			$: $1 $| <U:$1@> <E:>
R$* $| $+	$: $1 $| $>SearchList <! "TLS_Rcpt"> $| $2 <>
R$* $| <?>	$@ OK
R$* $| <$* <TMPF>>	$#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R$* $| <$+>	$@ $>"TLS_connection" $&{verify} $| <$2>

######################################################################
###  tls_client: is connection with client "good" enough?
###	(done in server)
###
###	Parameters:
###		${verify} $| (MAIL|STARTTLS)
######################################################################
Stls_client
R$*		$: $(macro {TLS_Name} $@ $&{client_name} $) $1
R$* $| $*	$: $1 $| $>D <$&{client_name}> <?> <! "TLS_Clt"> <>
R$* $| <?>$*	$: $1 $| $>A <$&{client_addr}> <?> <! "TLS_Clt"> <>
R$* $| <?>$*	$: $1 $| <$(access "TLS_Clt": $: ? $)>
R$* $| <$* <TMPF>>	$#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R$*		$@ $>"TLS_connection" $1

######################################################################
###  tls_server: is connection with server "good" enough?
###	(done in client)
###
###	Parameter:
###		${verify}
######################################################################
Stls_server

R$*		$: $(macro {TLS_Name} $@ $&{server_name} $) $1
R$*		$: $1 $| $>D <$&{server_name}> <?> <! "TLS_Srv"> <>
R$* $| <?>$*	$: $1 $| $>A <$&{server_addr}> <?> <! "TLS_Srv"> <>
R$* $| <?>$*	$: $1 $| <$(access "TLS_Srv": $: ? $)>
R$* $| <$* <TMPF>>	$#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R$*		$@ $>"TLS_connection" $1

######################################################################
###  TLS_connection: is TLS connection "good" enough?
###
###	Parameters:
###		${verify} $| <Requirement> [<>]
###		Requirement: RHS from access map, may be ? for none.
######################################################################
STLS_connection
R$* $| <$*>$*			$: $1 $| <$2>
# create the appropriate error codes
R$* $| <PERM + $={Tls} $*>	$: $1 $| <503:5.7.0> <$2 $3>
R$* $| <TEMP + $={Tls} $*>	$: $1 $| <403:4.7.0> <$2 $3>
R$* $| <$={Tls} $*>		$: $1 $| <403:4.7.0> <$2 $3>
# deal with TLS handshake failures: abort
RSOFTWARE $| <$-:$+> $* 	$#error $@ $2 $: $1 " TLS handshake failed."
RSOFTWARE $| $* 		$#error $@ 4.7.0 $: "403 TLS handshake failed."
# deal with TLS protocol errors: abort
RPROTOCOL $| <$-:$+> $* 	$#error $@ $2 $: $1 " STARTTLS failed."
RPROTOCOL $| $* 		$#error $@ 4.7.0 $: "403 STARTTLS failed."
# deal with DANE errors: abort
RDANE_FAIL $| <$-:$+> $* 	$#error $@ $2 $: $1 " DANE check failed."
RDANE_FAIL $| $* 		$#error $@ 4.7.0 $: "403 DANE check failed."
R$* $| <$*> <VERIFY>		$: <$2> <VERIFY> <> $1
R$* $| <$*> <VERIFY + $+>	$: <$2> <VERIFY> <$3> $1
R$* $| <$*> <$={Tls}:$->$*	$: <$2> <$3:$4> <> $1
R$* $| <$*> <$={Tls}:$- + $+>$*	$: <$2> <$3:$4> <$5> $1
R$* $| $*			$@ OK
# authentication required: give appropriate error
# other side did authenticate (via STARTTLS)
R<$*><VERIFY> <> $={TlsVerified}	$@ OK
R<$*><VERIFY> <$+> $={TlsVerified}	$: <$1> <REQ:0> <$2>
R<$*><VERIFY:$-> <$*> $={TlsVerified}	$: <$1> <REQ:$2> <$3>
R<$*><ENCR:$-> <$*> $*		$: <$1> <REQ:$2> <$3>
R<$-:$+><VERIFY $*> <$*>	$#error $@ $2 $: $1 " authentication required"
R<$-:$+><VERIFY $*> <$*> FAIL	$#error $@ $2 $: $1 " authentication failed"
R<$-:$+><VERIFY $*> <$*> NO	$#error $@ $2 $: $1 " not authenticated"
R<$-:$+><VERIFY $*> <$*> NOT	$#error $@ $2 $: $1 " no authentication requested"
R<$-:$+><VERIFY $*> <$*> NONE	$#error $@ $2 $: $1 " other side does not support STARTTLS"
R<$-:$+><VERIFY $*> <$*> CLEAR	$#error $@ $2 $: $1 " STARTTLS disabled locally"
R<$-:$+><VERIFY $*> <$*> $+	$#error $@ $2 $: $1 " authentication failure " $4
R<$*><REQ:$-> <$*>		$: <$1> <REQ:$2> <$3> $>max $&{cipher_bits} : $&{auth_ssf}
R<$*><REQ:$-> <$*> $-		$: <$1> <$2:$4> <$3> $(arith l $@ $4 $@ $2 $)
R<$-:$+><$-:$-> <$*> TRUE	$#error $@ $2 $: $1 " encryption too weak " $4 " less than " $3
R<$-:$+><$-:$-> <$*> $*		$: <$1:$2 ++ $5>
R<$-:$+ ++ >			$@ OK
R<$-:$+ ++ $+ >			$: <$1:$2> <$3>
R<$-:$+> < $+ ++ $+ >		<$1:$2> <$3> <$4>
R<$-:$+> $+			$@ $>"TLS_req" $3 $| <$1:$2>

######################################################################
###  TLS_req: check additional TLS requirements
###
###	Parameters: [<list> <of> <req>] $| <$-:$+>
###		$-: SMTP reply code
###		$+: Enhanced Status Code
######################################################################
STLS_req
R $| $+		$@ OK
R<CN> $* $| <$+>		$: <CN:$&{TLS_Name}> $1 $| <$2>
R<CN:$&{cn_subject}> $* $| <$+>		$@ $>"TLS_req" $1 $| <$2>
R<CN:$+> $* $| <$-:$+>	$#error $@ $4 $: $3 " CN " $&{cn_subject} " does not match " $1
R<CS:$&{cert_subject}> $* $| <$+>	$@ $>"TLS_req" $1 $| <$2>
R<CS:$+> $* $| <$-:$+>	$#error $@ $4 $: $3 " Cert Subject " $&{cert_subject} " does not match " $1
R<CI:$&{cert_issuer}> $* $| <$+>	$@ $>"TLS_req" $1 $| <$2>
R<CI:$+> $* $| <$-:$+>	$#error $@ $4 $: $3 " Cert Issuer " $&{cert_issuer} " does not match " $1
R<CITag:$-> $* $| <$+>	$: <$(access $1:$&{cert_issuer} $: ? $)> $2 $| <$3>
R<?> $* $| <$-:$+>	$#error $@ $3 $: $2 " Cert Issuer " $&{cert_issuer} " not acceptable"
R<OK> $* $| <$+>	$@ $>"TLS_req" $1 $| <$2>
ROK			$@ OK

######################################################################
###  max: return the maximum of two values separated by :
###
###	Parameters: [$-]:[$-]
######################################################################
Smax
R:		$: 0
R:$-		$: $1
R$-:		$: $1
R$-:$-		$: $(arith l $@ $1 $@ $2 $) : $1 : $2
RTRUE:$-:$-	$: $2
R$-:$-:$-	$: $2




######################################################################
###  RelayTLS: allow relaying based on TLS authentication
###
###	Parameters:
###		none
######################################################################
SRelayTLS
# authenticated?
R$*			$: <?> $&{verify}
R<?> $={TlsVerified}	$: OK		authenticated: continue
R<?> $*			$@ NO		not authenticated
R$*			$: $&{cert_issuer}
R$+			$: $(access CERTISSUER:$1 $)
RRELAY			$# RELAY
RSUBJECT		$: <@> $&{cert_subject}
R<@> $+			$: <@> $(access CERTSUBJECT:$1 $)
R<@> RELAY		$# RELAY
R$*			$: NO

######################################################################
###  authinfo: lookup authinfo in the access map
###
###	Parameters:
###		$1: {server_name}
###		$2: {server_addr}
######################################################################
Sauthinfo
R$*		$: $1 $| $>D <$&{server_name}> <?> <! AuthInfo> <>
R$* $| <?>$*	$: $1 $| $>A <$&{server_addr}> <?> <! AuthInfo> <>
R$* $| <?>$*	$: $1 $| <$(access AuthInfo: $: ? $)> <>
R$* $| <?>$*	$@ no				no authinfo available
R$* $| <$*> <>	$# $2





#
######################################################################
######################################################################
#####
#####			MAIL FILTER DEFINITIONS
#####
######################################################################
######################################################################

#
######################################################################
######################################################################
#####
#####			MAILER DEFINITIONS
#####
######################################################################
######################################################################


##################################################
###   Local and Program Mailer specification   ###
##################################################

#####  $Id: local.m4,v 8.60 2013-11-22 20:51:14 ca Exp $  #####

#
#  Envelope sender rewriting
#
SEnvFromL
R<@>			$n			errors to mailer-daemon
R@ <@ $*>		$n			temporarily bypass Sun bogosity
R$+			$: $>AddDomain $1	add local domain if needed
R$*			$: $>MasqEnv $1		do masquerading

#
#  Envelope recipient rewriting
#
SEnvToL
R$+ < @ $* >		$: $1			strip host part
R$+ + $*		$: < $&{addr_type} > $1 + $2	mark with addr type
R<e s> $+ + $*		$: $1			remove +detail for sender
R< $* > $+		$: $2			else remove mark

#
#  Header sender rewriting
#
SHdrFromL
R<@>			$n			errors to mailer-daemon
R@ <@ $*>		$n			temporarily bypass Sun bogosity
R$+			$: $>AddDomain $1	add local domain if needed
R$*			$: $>MasqHdr $1		do masquerading

#
#  Header recipient rewriting
#
SHdrToL
R$+			$: $>AddDomain $1	add local domain if needed
R$* < @ *LOCAL* > $*	$: $1 < @ $j . > $2

#
#  Common code to add local domain name (only if always-add-domain)
#
SAddDomain

Mlocal,		P=/usr/libexec/mail.local, F=lsDFMAw5:/|@qPSXmnz9, S=EnvFromSMTP/HdrFromL, R=EnvToL/HdrToL,
		T=DNS/RFC822/SMTP,
		A=mail.local -l
Mprog,		P=/bin/sh, F=lsDFMoqeu9, S=EnvFromL/HdrFromL, R=EnvToL/HdrToL, D=$z:/,
		T=X-Unix/X-Unix/X-Unix,
		A=sh -c $u

#####################################
###   SMTP Mailer specification   ###
#####################################

#####  $Id: smtp.m4,v 8.66 2013-11-22 20:51:14 ca Exp $  #####

#
#  common sender and masquerading recipient rewriting
#
SMasqSMTP
R$* < @ $* > $*		$@ $1 < @ $2 > $3		already fully qualified
R$+			$@ $1 < @ *LOCAL* >		add local qualification

#
#  convert pseudo-domain addresses to real domain addresses
#
SPseudoToReal

# pass <route-addr>s through
R< @ $+ > $*		$@ < @ $1 > $2			resolve <route-addr>

# output fake domains as user%fake@relay

# do UUCP heuristics; note that these are shared with UUCP mailers
R$+ < @ $+ .UUCP. >	$: < $2 ! > $1			convert to UUCP form
R$+ < @ $* > $*		$@ $1 < @ $2 > $3		not UUCP form

# leave these in .UUCP form to avoid further tampering
R< $&h ! > $- ! $+	$@ $2 < @ $1 .UUCP. >
R< $&h ! > $-.$+ ! $+	$@ $3 < @ $1.$2 >
R< $&h ! > $+		$@ $1 < @ $&h .UUCP. >
R< $+ ! > $+		$: $1 ! $2 < @ $Y >		use UUCP_RELAY
R$+ < @ $~[ $* : $+ >	$@ $1 < @ $4 >			strip mailer: part
R$+ < @ >		$: $1 < @ *LOCAL* >		if no UUCP_RELAY


#
#  envelope sender rewriting
#
SEnvFromSMTP
R$+			$: $>PseudoToReal $1		sender/recipient common
R$* :; <@>		$@				list:; special case
R$*			$: $>MasqSMTP $1		qualify unqual'ed names
R$+			$: $>MasqEnv $1			do masquerading


#
#  envelope recipient rewriting --
#  also header recipient if not masquerading recipients
#
SEnvToSMTP
R$+			$: $>PseudoToReal $1		sender/recipient common
R$+			$: $>MasqSMTP $1		qualify unqual'ed names
R$* < @ *LOCAL* > $*	$: $1 < @ $j . > $2

#
#  header sender and masquerading header recipient rewriting
#
SHdrFromSMTP
R$+			$: $>PseudoToReal $1		sender/recipient common
R:; <@>			$@				list:; special case

# do special header rewriting
R$* <@> $*		$@ $1 <@> $2			pass null host through
R< @ $* > $*		$@ < @ $1 > $2			pass route-addr through
R$*			$: $>MasqSMTP $1		qualify unqual'ed names
R$+			$: $>MasqHdr $1			do masquerading


#
#  relay mailer header masquerading recipient rewriting
#
SMasqRelay
R$+			$: $>MasqSMTP $1
R$+			$: $>MasqHdr $1

Msmtp,		P=[IPC], F=mDFMuX, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990,
		T=DNS/RFC822/SMTP,
		A=TCP $h
Mesmtp,		P=[IPC], F=mDFMuXa, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990,
		T=DNS/RFC822/SMTP,
		A=TCP $h
Msmtp8,		P=[IPC], F=mDFMuX8, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990,
		T=DNS/RFC822/SMTP,
		A=TCP $h
Mdsmtp,		P=[IPC], F=mDFMuXa%, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990,
		T=DNS/RFC822/SMTP,
		A=TCP $h
Mrelay,		P=[IPC], F=mDFMuXa8, S=EnvFromSMTP/HdrFromSMTP, R=MasqSMTP, E=\r\n, L=2040,
		T=DNS/RFC822/SMTP,
		A=TCP $h

