1divert(-1) 2# 3# Copyright (c) 1983 Eric P. Allman 4# Copyright (c) 1988 The Regents of the University of California. 5# All rights reserved. 6# 7# %sccs.include.redist.sh% 8# 9divert(0) 10 11VERSIONID(`@(#)proto.m4 6.31 (Berkeley) 04/04/93') 12 13MAILER(local)dnl 14 15ifdef(`_OLD_SENDMAIL_', `dnl', 16`# level 4 config file format 17V4') 18 19################## 20# local info # 21################## 22 23Cwlocalhost 24ifdef(`USE_CW_FILE', 25`# file containing names of hosts for which we receive email 26CONCAT(`Fw', confCW_FILE)', `dnl') 27 28ifdef(`UUCP_RELAY', 29`# UUCP relay host 30CONCAT(DY, UUCP_RELAY) 31 32')dnl 33ifdef(`BITNET_RELAY', 34`# BITNET relay host 35CONCAT(DB, BITNET_RELAY) 36 37')dnl 38ifdef(`CSNET_RELAY', 39`# CSNET relay host 40CONCAT(DC, CSNET_RELAY) 41 42')dnl 43ifdef(`FAX_RELAY', 44`# FAX relay host 45CONCAT(DF, FAX_RELAY) 46 47')dnl 48ifdef(`SMART_HOST', 49`# "Smart" UUCP relay host 50CONCAT(DS, SMART_HOST) 51 52')dnl 53ifdef(`MAILER_TABLE', 54`# Mailer table (overriding domains) 55Kmailertable MAILER_TABLE 56 57')dnl 58# who I send unqualified names to (null means deliver locally) 59CONCAT(DR, ifdef(`LOCAL_RELAY', LOCAL_RELAY)) 60 61# who gets all local email traffic ($R has precedence for unqualified names) 62CONCAT(DH, ifdef(`MAIL_HUB', MAIL_HUB)) 63 64# my official hostname ($w or $w.$D) 65CONCAT(Dj$w, ifdef(`NEED_DOMAIN', .$D)) 66 67# who I masquerade as (can be $j) 68CONCAT(DM, ifdef(`MASQUERADE_NAME', MASQUERADE_NAME, $j)) 69 70# class L: names that should be delivered locally, even if we have a relay 71# class E: names that should be exposed as from this host, even if we masquerade 72CLroot 73CEroot 74undivert(5)dnl 75 76# operators that cannot be in local usernames (i.e., network indicators) 77CO @ % ifdef(`_NO_UUCP_', `', `!') 78 79# a class with just dot (for identifying canonical names) 80C.. 81 82ifdef(`_OLD_SENDMAIL_', `dnl', 83`# dequoting map 84Kdequote dequote') 85 86###################### 87# Special macros # 88###################### 89 90# SMTP initial login message 91CONCAT(De, confSMTP_LOGIN_MSG) 92 93# UNIX initial From header format 94CONCAT(Dl, confFROM_LINE) 95 96# my name for error messages 97CONCAT(Dn, confMAILER_NAME) 98 99# delimiter (operator) characters 100CONCAT(Do, confOPERATORS) 101 102# format of a total name 103CONCAT(Dq, ifdef(`confFROM_HEADER', confFROM_HEADER, 104 ifdef(`_OLD_SENDMAIL_', `$g$?x ($x)$.', `$?x$x <$g>$|$g$.'))) 105include(`../m4/version.m4') 106 107############### 108# Options # 109############### 110 111# preserve 8 bits on message body on input? 112CONCAT(O8, confEIGHT_BIT_INPUT) 113 114# wait (in minutes) for alias file rebuild 115CONCAT(Oa, confALIAS_WAIT) 116 117# location of alias file 118CONCAT(OA, ifdef(`ALIAS_FILE', ALIAS_FILE, /etc/aliases)) 119 120# minimum number of free blocks on filesystem 121CONCAT(Ob, confMIN_FREE_BLOCKS) 122 123# substitution for space (blank) characters 124CONCAT(OB, confBLANK_SUB) 125 126# connect to "expensive" mailers on initial submission? 127CONCAT(Oc, confCON_EXPENSIVE) 128 129# checkpoint queue runs after every N successful deliveries 130CONCAT(OC, confCHECKPOINT_INTERVAL) 131 132# default delivery mode 133CONCAT(Od, confDELIVERY_MODE) 134 135# automatically rebuild the alias database? 136CONCAT(OD, confAUTO_REBUILD) 137 138# error message header/file */ 139ifdef(`confERROR_MESSAGE', 140 concat(OE, confERROR_MESSAGE), 141 #OE/etc/sendmail.oE) 142 143# error mode 144ifdef(`confERROR_MODE', 145 concat(Oe, confERROR_MODE), 146 #Oep) 147 148# save Unix-style "From_" lines at top of header? 149CONCAT(Of, confSAVE_FROM_LINES) 150 151# temporary file mode 152CONCAT(OF, confTEMP_FILE_MODE) 153 154# match recipients against GECOS field? 155CONCAT(OG, confMATCH_GECOS) 156 157# default GID 158CONCAT(Og, confDEF_GROUP_ID) 159 160# maximum hop count 161CONCAT(Oh, confMAX_HOP) 162 163# location of help file 164CONCAT(OH, ifdef(`HELP_FILE', HELP_FILE, /usr/lib/sendmail.hf)) 165 166# ignore dots as terminators in incoming messages? 167CONCAT(Oi, confIGNORE_DOTS) 168 169# Insist that the BIND name server be running to resolve names 170ifdef(`confBIND_OPTS', 171 CONCAT(OI, confBIND_OPTS), 172 #OI) 173 174# Forward file search path 175ifdef(`confFORWARD_PATH', 176 CONCAT(OJ, confFORWARD_PATH), 177 #OJ/var/forward/$u:$z/.forward.$w:$z/.forward) 178 179# open connection cache size 180CONCAT(Ok, confMCI_CACHE_SIZE) 181 182# open connection cache timeout 183CONCAT(OK, confMCI_CACHE_TIMEOUT) 184 185# log level 186CONCAT(OL, confLOG_LEVEL) 187 188# send to me too, even in an alias expansion? 189CONCAT(Om, confME_TOO) 190 191# verify RHS in newaliases? 192CONCAT(On, confCHECK_ALIASES) 193 194# default messages to old style headers if no special punctuation? 195CONCAT(Oo, confOLD_STYLE_HEADERS) 196 197# SMTP daemon options 198ifdef(`confDAEMON_OPTIONS', 199 CONCAT(OO, confDAEMON_OPTIONS), 200 #OOPort=esmtp) 201 202# privacy flags 203CONCAT(Op, confPRIVACY_FLAGS) 204 205# who (if anyone) should get extra copies of error messages 206ifdef(`confCOPY_ERRORS_TO', 207 CONCAT(OP, confCOPY_ERRORS_TO), 208 #OPPostmaster) 209 210# slope of queue-only function 211ifdef(`confQUEUE_FACTOR', 212 CONCAT(Oq, confQUEUE_FACTOR), 213 #Oq600000) 214 215# queue directory 216CONCAT(OQ, ifdef(`QUEUE_DIR', QUEUE_DIR, /var/spool/mqueue)) 217 218# read timeout -- now OK per RFC 1123 section 5.3.2 219ifdef(`confREAD_TIMEOUT', 220 CONCAT(Or, confREAD_TIMEOUT), 221 #Ordatablock=10m) 222 223# queue up everything before forking? 224CONCAT(Os, confSAFE_QUEUE) 225 226# status file 227CONCAT(OS, ifdef(`STATUS_FILE', STATUS_FILE, /etc/sendmail.st)) 228 229# default message timeout interval 230CONCAT(OT, confMESSAGE_TIMEOUT) 231 232# time zone handling: 233# if undefined, use system default 234# if defined but null, use TZ envariable passed in 235# if defined and non-null, use that info 236ifelse(confTIME_ZONE, `USE_SYSTEM', `#Ot', 237 confTIME_ZONE, `USE_TZ', `', 238 `CONCAT(Ot, confTIME_ZONE)') 239 240# default UID 241CONCAT(Ou, confDEF_USER_ID) 242 243# list of locations of user database file (null means no lookup) 244OU`'ifdef(`confUSERDB_SPEC', `confUSERDB_SPEC') 245 246# fallback MX host 247ifdef(`confFALLBACK_MX', 248 CONCAT(OV, confFALLBACK_MX), 249 #OVfall.back.host.net) 250 251# load average at which we just queue messages 252CONCAT(Ox, confQUEUE_LA) 253 254# load average at which we refuse connections 255CONCAT(OX, confREFUSE_LA) 256 257# work recipient factor 258ifdef(`confWORK_RECIPIENT_FACTOR', 259 CONCAT(Oy, confWORK_RECIPIENT_FACTOR), 260 #Oy30000) 261 262# deliver each queued job in a separate process? 263CONCAT(OY, confSEPARATE_PROC) 264 265# work class factor 266ifdef(`confWORK_CLASS_FACTOR', 267 CONCAT(Oz, confWORK_CLASS_FACTOR), 268 #Oz1800) 269 270# work time factor 271ifdef(`confWORK_TIME_FACTOR', 272 CONCAT(OZ, confWORK_TIME_FACTOR), 273 #OZ90000) 274 275########################### 276# Message precedences # 277########################### 278 279Pfirst-class=0 280Pspecial-delivery=100 281Plist=-30 282Pbulk=-60 283Pjunk=-100 284 285##################### 286# Trusted users # 287##################### 288 289Troot 290Tdaemon 291Tuucp 292 293######################### 294# Format of headers # 295######################### 296 297H?P?Return-Path: $g 298HReceived: $?sfrom $s $.$?_($_) $.by $j ($v/$Z) id $i; $b 299H?D?Resent-Date: $a 300H?D?Date: $a 301H?F?Resent-From: $q 302H?F?From: $q 303H?x?Full-Name: $x 304HSubject: 305# HPosted-Date: $a 306# H?l?Received-Date: $b 307H?M?Resent-Message-Id: <$t.$i@$j> 308H?M?Message-Id: <$t.$i@$j> 309undivert(6)dnl 310# 311###################################################################### 312###################################################################### 313##### 314##### REWRITING RULES 315##### 316###################################################################### 317###################################################################### 318 319undivert(9)dnl 320 321########################################### 322### Rulset 3 -- Name Canonicalization ### 323########################################### 324S3 325 326# handle null input and list syntax (translate to <@> special case) 327R$@ $@ <@> 328R$*:;$* $@ $1 :; <@> 329 330# basic textual canonicalization -- note RFC733 heuristic here 331R$*<$*>$*<$*>$* <$2>$3$4$5 strip multiple <> <> 332R$*<$*<$+>$*>$* <$3>$5 2-level <> nesting 333R$*<>$* $@ <@> MAIL FROM:<> case 334R$*<$+>$* $2 basic RFC821/822 parsing 335 336# make sure <@a,@b,@c:user@d> syntax is easy to parse -- undone later 337R@ $+ , $+ @ $1 : $2 change all "," to ":" 338 339# localize and dispose of route-based addresses 340R@ $+ : $+ $@ $>6 < @$1 > : $2 handle <route-addr> 341 342# find focus for list syntax 343R $+ : $* ; @ $+ $@ $>6 $1 : $2 ; < @ $3 > list syntax 344R $+ : $* ; $@ $1 : $2; list syntax 345 346# find focus for @ syntax addresses 347R$+ @ $+ $: $1 < @ $2 > focus on domain 348R$+ < $+ @ $+ > $1 $2 < @ $3 > move gaze right 349R$+ < @ $+ > $@ $>6 $1 < @ $2 > already canonical 350 351ifdef(`_NO_UUCP_', `dnl', 352`# convert old-style addresses to a domain-based address 353R$- ! $+ $@ $>6 $2 < @ $1 .UUCP > resolve uucp names 354R$+ . $- ! $+ $@ $>6 $3 < @ $1 . $2 > domain uucps 355R$+ ! $+ $@ $>6 $2 < @ $1 .UUCP > uucp subdomains') 356 357# if we have % signs, take the rightmost one 358R$* % $* $1 @ $2 First make them all @s. 359R$* @ $* @ $* $1 % $2 @ $3 Undo all but the last. 360R$* @ $* $@ $>6 $1 < @ $2 > Insert < > and finish 361 362# else we must be a local name 363 364 365############################################### 366### Ruleset 6 -- bottom half of ruleset 3 ### 367############################################### 368 369# At this point, everything should be in a "local_part<@domain>extra" format. 370S6 371 372# handle special cases for local names 373R$* < @ $=w > $* $: $1 < @ $j . > $3 no domain at all 374R$* < @ $=w . UUCP > $* $: $1 < @ $j . > $3 .UUCP domain 375undivert(2)dnl 376 377ifdef(`UUCP_RELAY', 378`# pass UUCP addresses straight through 379R$* < @ $+ . UUCP > $* $@ $1 < @ $2 . UUCP > $3', 380`# if really UUCP, handle it immediately 381ifdef(`_CLASS_U_', 382`R$* < @ $=U . UUCP > $* $@ $1 < @ $2 . UUCP > $3', `dnl') 383ifdef(`_CLASS_V_', 384`R$* < @ $=V . UUCP > $* $@ $1 < @ $2 . UUCP > $3', `dnl') 385ifdef(`_CLASS_W_', 386`R$* < @ $=W . UUCP > $* $@ $1 < @ $2 . UUCP > $3', `dnl') 387ifdef(`_CLASS_X_', 388`R$* < @ $=X . UUCP > $* $@ $1 < @ $2 . UUCP > $3', `dnl') 389ifdef(`_CLASS_Y_', 390`R$* < @ $=Y . UUCP > $* $@ $1 < @ $2 . UUCP > $3', `dnl') 391 392# try UUCP traffic as a local address 393R$* < @ $+ . UUCP > $* $: $1 < @ $[ $2 $] . UUCP > $3 394ifdef(`_OLD_SENDMAIL_', 395`R$* < @ $+ . $+ . UUCP > $* $@ $1 < @ $2 . $3 . > $4', 396`R$* < @ $+ . . UUCP > $* $@ $1 < @ $2 . > $3')') 397 398# pass to name server to make hostname canonical 399R$* < @ $* $~. > $* $: $1 < @ $[ $2 $3 $] > $4 400 401# handle possible alternate names 402R$* < @ $=w . $m . > $* $: $1 < @ $j . > $3 403R$* < @ $=w . $m > $* $: $1 < @ $j . > $3 404undivert(8)dnl 405 406# if this is the local hostname, make sure we treat is as canonical 407R$* < @ $j > $* $: $1 < @ $j . > $2 408 409 410################################################## 411### Ruleset 4 -- Final Output Post-rewriting ### 412################################################## 413S4 414 415R$*<@> $@ $1 handle <> and list:; 416 417# resolve numeric addresses to name if possible 418R$* < @ [ $+ ] > $* $: $1 < @ $[ [$2] $] > $3 lookup numeric internet addr 419 420# strip trailing dot off possibly canonical name 421R$* < @ $+ . > $* $1 < @ $2 > $3 422 423# externalize local domain info 424R$* < $+ > $* $1 $2 $3 defocus 425R@ $+ : @ $+ : $+ @ $1 , @ $2 : $3 <route-addr> canonical 426R@ $* $@ @ $1 ... and exit 427 428ifdef(`_NO_UUCP_', `dnl', 429`# UUCP must always be presented in old form 430R$+ @ $- . UUCP $2!$1 u@h.UUCP => h!u') 431 432# delete duplicate local names 433R$+ % $=w @ $=w $1 @ $j u%host@host => u@host 434 435 436 437############################################################# 438### Ruleset 7 -- recanonicalize and call ruleset zero ### 439### (used for recursive calls) ### 440############################################################# 441 442S7 443R$* $: $>3 $1 444R$* $@ $>0 $1 445 446 447###################################### 448### Ruleset 0 -- Parse Address ### 449###################################### 450 451S0 452 453R<@> $#local $: <> special case error msgs 454 455ifdef(`_MAILER_smtp_', 456`# handle numeric address spec 457R$* < @ [ $+ ] > $* $: $1 < @ $[ [$2] $] > $3 numeric internet addr 458R$* < @ [ $+ ] > $* $#smtp $@ [$2] $: $1 @ [$2] $3 numeric internet spec', 459`dnl') 460 461# now delete the local info -- note $=O to find characters that cause forwarding 462R$* < @ > $* $@ $>7 $1 user@ => user 463R< @ $j . > : $* $@ $>7 $1 @here:... -> ... 464R$* $=O $* < @ $j . > $@ $>7 $1 $2 $3 ...@here -> ... 465ifdef(`MAILER_TABLE', 466` 467# try mailer table lookup 468R$* < @ $+ > $* $: $1 < @ $(mailertable $2 $) > $3 469R$* < @ $-:$+ > $* $# $2 $@ $3 $: $1 < @ $3 > $4 found a match', 470`dnl') 471 472# short circuit local delivery so forwarded email works 473ifdef(`_LOCAL_NOT_STICKY_', 474`R$=L < @ $j . > $#local $: @ $1 special local names 475R$+ < @ $j . > $#local $: $1 dispose directly', 476`R$+ < @ $j . > $: $1 < @ $j @ $H > first try hub 477ifdef(`_OLD_SENDMAIL_', 478`R$+ < $+ @ $-:$+ > $# $3 $@ $4 $: $1 < $2 > yep .... 479R$+ < $+ @ $+ > $#relay $@ $3 $: $1 < $2 > yep .... 480R$+ < $+ @ > $#local $: $1 nope, local address', 481`R$+ < $+ @ $+ > $#local $: $1 yep .... 482R$+ < $+ @ > $#local $: @ $1 nope, local address')') 483undivert(3)dnl 484undivert(4)dnl 485 486# resolve remotely connected UUCP links (if any) 487ifdef(`_CLASS_V_', 488`R$* < @ $=V . UUCP > $* $#smtp $@ $V $: <@ $V> : $1 @ $2.UUCP $3', 489 `dnl') 490ifdef(`_CLASS_W_', 491`R$* < @ $=W . UUCP > $* $#smtp $@ $W $: <@ $W> : $1 @ $2.UUCP $3', 492 `dnl') 493ifdef(`_CLASS_X_', 494`R$* < @ $=X . UUCP > $* $#smtp $@ $X $: <@ $X> : $1 @ $2.UUCP $3', 495 `dnl') 496 497# resolve fake top level domains by forwarding to other hosts 498ifdef(`BITNET_RELAY', 499`R$*<@$+.BITNET>$* $#smtp $@ $B $: $1 <@$2.BITNET> $3 user@host.BITNET', 500 `dnl') 501ifdef(`CSNET_RELAY', 502`R$*<@$+.CSNET>$* $#smtp $@ $C $: $1 <@$2.CSNET> $3 user@host.CSNET', 503 `dnl') 504ifdef(`_MAILER_fax_', 505`R$+ < @ $+ .FAX > $#fax $@ $2 $: $1 user@host.FAX', 506`ifdef(`FAX_RELAY', 507`R$*<@$+.FAX>$* $#smtp $@ $F $: $1 <@$2.FAX> $3 user@host.FAX', 508 `dnl')') 509 510ifdef(`UUCP_RELAY', 511`# forward non-local UUCP traffic to our UUCP relay 512R$*<@$*.UUCP>$* $#smtp $@ $Y $: <@ $Y> : $1 @ $2.UUCP $3 uucp mail', 513`ifdef(`_MAILER_uucp_', 514`# forward other UUCP traffic straight to UUCP 515R< @ $+ .UUCP > : $+ $#uucp $@ $1 $: $1:$2 @host.UUCP:... 516R$+ < @ $+ .UUCP > $#uucp $@ $2 $: $1 user@host.UUCP', 517 `dnl')') 518 519ifdef(`_LOCAL_RULES_', 520`# figure out what should stay in our local mail system 521undivert(1)', 522`ifdef(`_MAILER_smtp_', 523`# deal with other remote names 524R$* < @ $* > $* $#smtp $@ $2 $: $1 < @ $2 > $3 user@host.domain')') 525ifdef(`SMART_HOST', ` 526# pass names that still have a host to a smarthost 527R$* < @ $* > $* $: < $S > $1 < @ $2 > $3 glue on smarthost name 528R<$-:$+> $* < @$* > $* $# $1 $@ $2 $: $3 < @ $4 > $5 if non-null, use it 529R<$+> $* < @$* > $* $#suucp $@ $1 $: $2 < @ $3 > $4 if non-null, use it 530R<> $* < @ $* > $* $1 < @ $2 > $3 else strip off gunk', 531`ifdef(`_LOCAL_RULES_', ` 532# reject messages that have host names we do not understand 533R$* < @ $* > $* $#error $@ NOHOST $: Unrecognized host name $2', 534`dnl')') 535ifdef(`_MAILER_USENET_', ` 536# addresses sent to net.group.USENET will get forwarded to a newsgroup 537R$+ . USENET $# usenet $: $1') 538 539ifdef(`_OLD_SENDMAIL_', 540`# forward remaining names to local relay, if any 541R$=L $#local $: $1 special local names 542R$+ $: $1 < @ $R > append relay 543R$+ < @ > $: $1 < @ $H > no relay, try hub 544R$+ < @ > $#local $: $1 no relay or hub: local 545R$+ < @ $j > $#local $: $1 we are relay/hub: local 546R$+ < @ $-:$+ > $# $2 $@ $3 $: $1 deliver to relay/hub 547R$+ < @ $+ > $#relay $@ $2 $: $1 deliver to relay/hub', 548 549`# if this is quoted, strip the quotes and try again 550R$+ $: $(dequote $1 $) strip quotes 551R$* $=O $* $@ $>7 $1 $2 $3 try again 552 553# handle locally delivered names 554R$=L $#local $: @ $1 special local names 555R$+ $#local $: $1 regular local names 556 557########################################################################### 558### Ruleset 5 -- special rewriting after aliases have been expanded ### 559### (new sendmail only) ### 560########################################################################### 561 562S5 563 564# see if we have a relay or a hub 565R$+ $: $1 < @ $R > 566R$+ < @ > $: $1 < @ $H > no relay, try hub 567R$+ < @ $j > $@ $1 we are relay/hub: local 568R$+ < @ $-:$+ > $# $2 $@ $3 $: $1 send to relay or hub 569ifdef(`_MAILER_smtp_', 570`R$+ < @ $+ > $#relay $@ $2 $: $1 send to relay or hub')') 571# 572###################################################################### 573###################################################################### 574##### 575`##### MAILER DEFINITIONS' 576##### 577###################################################################### 578###################################################################### 579undivert(7)dnl 580