/usr/share/sendmail/cf/mailer/smtp.m4 is in sendmail-cf 8.15.2-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | PUSHDIVERT(-1)
#
# Copyright (c) 1998-2001, 2006 Proofpoint, Inc. and its suppliers.
# All rights reserved.
# Copyright (c) 1983 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.
#
#
_DEFIFNOT(`_DEF_SMTP_MAILER_FLAGS', `mDFMuX')
_DEFIFNOT(`SMTP_MAILER_FLAGS',`')
_DEFIFNOT(`SMTP_MAILER_LL',`990')
_DEFIFNOT(`RELAY_MAILER_LL',`2040')
_DEFIFNOT(`RELAY_MAILER_FLAGS', `SMTP_MAILER_FLAGS')
ifdef(`SMTP_MAILER_ARGS',, `define(`SMTP_MAILER_ARGS', `TCP $h')')
ifdef(`ESMTP_MAILER_ARGS',, `define(`ESMTP_MAILER_ARGS', `TCP $h')')
ifdef(`SMTP8_MAILER_ARGS',, `define(`SMTP8_MAILER_ARGS', `TCP $h')')
ifdef(`DSMTP_MAILER_ARGS',, `define(`DSMTP_MAILER_ARGS', `TCP $h')')
ifdef(`RELAY_MAILER_ARGS',, `define(`RELAY_MAILER_ARGS', `TCP $h')')
define(`_SMTP_QGRP', `ifelse(defn(`SMTP_MAILER_QGRP'),`',`', ` Q=SMTP_MAILER_QGRP,')')dnl
define(`_ESMTP_QGRP', `ifelse(defn(`ESMTP_MAILER_QGRP'),`',`', ` Q=ESMTP_MAILER_QGRP,')')dnl
define(`_SMTP8_QGRP', `ifelse(defn(`SMTP8_MAILER_QGRP'),`',`', ` Q=SMTP8_MAILER_QGRP,')')dnl
define(`_DSMTP_QGRP', `ifelse(defn(`DSMTP_MAILER_QGRP'),`',`', ` Q=DSMTP_MAILER_QGRP,')')dnl
define(`_RELAY_QGRP', `ifelse(defn(`RELAY_MAILER_QGRP'),`',`', ` Q=RELAY_MAILER_QGRP,')')dnl
POPDIVERT
#####################################
### SMTP Mailer specification ###
#####################################
VERSIONID(`$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 > $2 resolve <route-addr>
# output fake domains as user%fake@relay
ifdef(`BITNET_RELAY',
`R$+ <@ $+ .BITNET. > $: $1 % $2 .BITNET < @ $B > user@host.BITNET
R$+.BITNET <@ $~[ $*:$+ > $: $1 .BITNET < @ $4 > strip mailer: part',
`dnl')
ifdef(`_NO_UUCP_', `dnl', `
# do UUCP heuristics; note that these are shared with UUCP mailers
R$+ < @ $+ .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=_MODMF_(CONCAT(_DEF_SMTP_MAILER_FLAGS, SMTP_MAILER_FLAGS), `SMTP'), S=EnvFromSMTP/HdrFromSMTP, R=ifdef(`_ALL_MASQUERADE_', `EnvToSMTP/HdrFromSMTP', `EnvToSMTP'), E=\r\n, L=SMTP_MAILER_LL,
_OPTINS(`SMTP_MAILER_MAX', `M=', `, ')_OPTINS(`SMTP_MAILER_MAXMSGS', `m=', `, ')_OPTINS(`SMTP_MAILER_MAXRCPTS', `r=', `, ')_OPTINS(`SMTP_MAILER_CHARSET', `C=', `, ')T=DNS/RFC822/SMTP,_SMTP_QGRP
A=SMTP_MAILER_ARGS
Mesmtp, P=[IPC], F=_MODMF_(CONCAT(_DEF_SMTP_MAILER_FLAGS, `a', SMTP_MAILER_FLAGS), `ESMTP'), S=EnvFromSMTP/HdrFromSMTP, R=ifdef(`_ALL_MASQUERADE_', `EnvToSMTP/HdrFromSMTP', `EnvToSMTP'), E=\r\n, L=SMTP_MAILER_LL,
_OPTINS(`SMTP_MAILER_MAX', `M=', `, ')_OPTINS(`SMTP_MAILER_MAXMSGS', `m=', `, ')_OPTINS(`SMTP_MAILER_MAXRCPTS', `r=', `, ')_OPTINS(`SMTP_MAILER_CHARSET', `C=', `, ')T=DNS/RFC822/SMTP,_ESMTP_QGRP
A=ESMTP_MAILER_ARGS
Msmtp8, P=[IPC], F=_MODMF_(CONCAT(_DEF_SMTP_MAILER_FLAGS, `8', SMTP_MAILER_FLAGS), `SMTP8'), S=EnvFromSMTP/HdrFromSMTP, R=ifdef(`_ALL_MASQUERADE_', `EnvToSMTP/HdrFromSMTP', `EnvToSMTP'), E=\r\n, L=SMTP_MAILER_LL,
_OPTINS(`SMTP_MAILER_MAX', `M=', `, ')_OPTINS(`SMTP_MAILER_MAXMSGS', `m=', `, ')_OPTINS(`SMTP_MAILER_MAXRCPTS', `r=', `, ')_OPTINS(`SMTP_MAILER_CHARSET', `C=', `, ')T=DNS/RFC822/SMTP,_SMTP8_QGRP
A=SMTP8_MAILER_ARGS
Mdsmtp, P=[IPC], F=_MODMF_(CONCAT(_DEF_SMTP_MAILER_FLAGS, `a%', SMTP_MAILER_FLAGS), `DSMTP'), S=EnvFromSMTP/HdrFromSMTP, R=ifdef(`_ALL_MASQUERADE_', `EnvToSMTP/HdrFromSMTP', `EnvToSMTP'), E=\r\n, L=SMTP_MAILER_LL,
_OPTINS(`SMTP_MAILER_MAX', `M=', `, ')_OPTINS(`SMTP_MAILER_MAXMSGS', `m=', `, ')_OPTINS(`SMTP_MAILER_MAXRCPTS', `r=', `, ')_OPTINS(`SMTP_MAILER_CHARSET', `C=', `, ')T=DNS/RFC822/SMTP,_DSMTP_QGRP
A=DSMTP_MAILER_ARGS
Mrelay, P=[IPC], F=_MODMF_(CONCAT(_DEF_SMTP_MAILER_FLAGS, `a8', RELAY_MAILER_FLAGS), `RELAY'), S=EnvFromSMTP/HdrFromSMTP, R=ifdef(`_ALL_MASQUERADE_', `MasqSMTP/MasqRelay', `MasqSMTP'), E=\r\n, L=RELAY_MAILER_LL,
_OPTINS(`RELAY_MAILER_CHARSET', `C=', `, ')_OPTINS(`RELAY_MAILER_MAXMSGS', `m=', `, ')_OPTINS(`SMTP_MAILER_MAXRCPTS', `r=', `, ')T=DNS/RFC822/SMTP,_RELAY_QGRP
A=RELAY_MAILER_ARGS
|