1divert(-1) 2# 3# Copyright (c) 1983 Eric P. Allman 4# Copyright (c) 1988, 1993 5# The Regents of the University of California. All rights reserved. 6# 7# %sccs.include.redist.sh% 8# 9divert(0) 10 11VERSIONID(`@(#)proto.m4 8.54 (Berkeley) 08/17/94') 12 13MAILER(local)dnl 14 15# level 6 config file format 16V6 17ifdef(`confSMTP_MAILER',, `define(`confSMTP_MAILER', `smtp')')dnl 18ifdef(`confLOCAL_MAILER',, `define(`confLOCAL_MAILER', `local')')dnl 19ifdef(`confRELAY_MAILER',, 20 `define(`confRELAY_MAILER', 21 `ifdef(`_MAILER_smtp_', `relay', 22 `ifdef(`_MAILER_uucp', `suucp', `unknown')')')')dnl 23define(`_SMTP_', `confSMTP_MAILER')dnl for readability only 24define(`_LOCAL_', `confLOCAL_MAILER')dnl for readability only 25define(`_RELAY_', `confRELAY_MAILER')dnl for readability only 26 27################## 28# local info # 29################## 30 31Cwlocalhost 32ifdef(`USE_CW_FILE', 33`# file containing names of hosts for which we receive email 34Fw`'confCW_FILE', 35 `dnl') 36ifdef(`confDOMAIN_NAME', ` 37# my official domain name 38Dj`'confDOMAIN_NAME', 39 `dnl') 40 41ifdef(`_NULL_CLIENT_ONLY_', 42`include(../m4/nullrelay.m4)m4exit', 43 `dnl') 44 45CP. 46 47ifdef(`UUCP_RELAY', 48`# UUCP relay host 49DY`'UUCP_RELAY 50CPUUCP 51 52')dnl 53ifdef(`BITNET_RELAY', 54`# BITNET relay host 55DB`'BITNET_RELAY 56CPBITNET 57 58')dnl 59ifdef(`FAX_RELAY', 60`# FAX relay host 61DF`'FAX_RELAY 62CPFAX 63 64')dnl 65# "Smart" relay host (may be null) 66DS`'ifdef(`SMART_HOST', SMART_HOST) 67 68ifdef(`MAILER_TABLE', 69`# Mailer table (overriding domains) 70Kmailertable MAILER_TABLE 71 72')dnl 73ifdef(`DOMAIN_TABLE', 74`# Domain table (adding domains) 75Kdomaintable DOMAIN_TABLE 76 77')dnl 78# who I send unqualified names to (null means deliver locally) 79DR`'ifdef(`LOCAL_RELAY', LOCAL_RELAY) 80 81# who gets all local email traffic ($R has precedence for unqualified names) 82DH`'ifdef(`MAIL_HUB', MAIL_HUB) 83 84# who I masquerade as (null for no masquerading) 85DM`'ifdef(`MASQUERADE_NAME', MASQUERADE_NAME) 86 87# class L: names that should be delivered locally, even if we have a relay 88# class E: names that should be exposed as from this host, even if we masquerade 89# class D: dotted names, e.g., root.machinename 90#CL root 91CE root 92undivert(5)dnl 93ifdef(`__DOTTED_USER_LIST__', 94 `__DOTTED_USER_LIST__', 95 `#CD postmaster') 96 97# operators that cannot be in local usernames (i.e., network indicators) 98CO @ % ifdef(`_NO_UUCP_', `', `!') 99 100# a class with just dot (for identifying canonical names) 101C.. 102 103# dequoting map 104Kdequote dequote 105 106undivert(6)dnl 107 108###################### 109# Special macros # 110###################### 111 112# SMTP initial login message 113De`'confSMTP_LOGIN_MSG 114 115# UNIX initial From header format 116Dl`'confFROM_LINE 117 118# my name for error messages 119Dn`'confMAILER_NAME 120 121# delimiter (operator) characters 122Do`'confOPERATORS 123 124# format of a total name 125Dq`'ifdef(`confFROM_HEADER', confFROM_HEADER, `$?x$x <$g>$|$g$.') 126include(`../m4/version.m4') 127 128############### 129# Options # 130############### 131 132# strip message body to 7 bits on input? 133O7`'confSEVEN_BIT_INPUT 134 135# 8-bit data handling 136O8`'confEIGHT_BIT_HANDLING 137 138# wait (in minutes) for alias file rebuild 139Oa`'confALIAS_WAIT 140 141# location of alias file 142OA`'ifdef(`ALIAS_FILE', `ALIAS_FILE', /etc/aliases) 143 144# minimum number of free blocks on filesystem 145Ob`'confMIN_FREE_BLOCKS 146 147# substitution for space (blank) characters 148OB`'confBLANK_SUB 149 150# avoid connecting to "expensive" mailers on initial submission? 151Oc`'confCON_EXPENSIVE 152 153# checkpoint queue runs after every N successful deliveries 154OC`'confCHECKPOINT_INTERVAL 155 156# default delivery mode 157Od`'confDELIVERY_MODE 158 159# automatically rebuild the alias database? 160OD`'confAUTO_REBUILD 161 162# error message header/file 163ifdef(`confERROR_MESSAGE', 164 OE`'confERROR_MESSAGE, 165 #OE/etc/sendmail.oE) 166 167# error mode 168ifdef(`confERROR_MODE', 169 Oe`'confERROR_MODE, 170 #Oep) 171 172# save Unix-style "From_" lines at top of header? 173Of`'confSAVE_FROM_LINES 174 175# temporary file mode 176OF`'confTEMP_FILE_MODE 177 178# match recipients against GECOS field? 179OG`'confMATCH_GECOS 180 181# default GID 182Og`'confDEF_GROUP_ID 183 184# maximum hop count 185Oh`'confMAX_HOP 186 187# location of help file 188OH`'ifdef(`HELP_FILE', HELP_FILE, /usr/lib/sendmail.hf) 189 190# ignore dots as terminators in incoming messages? 191Oi`'confIGNORE_DOTS 192 193# Insist that the BIND name server be running to resolve names 194ifdef(`confBIND_OPTS', 195 OI`'confBIND_OPTS, 196 #OI) 197 198# deliver MIME-encapsulated error messages? 199Oj`'confMIME_FORMAT_ERRORS 200 201# Forward file search path 202ifdef(`confFORWARD_PATH', 203 OJ`'confFORWARD_PATH, 204 #OJ/var/forward/$u:$z/.forward.$w:$z/.forward) 205 206# open connection cache size 207Ok`'confMCI_CACHE_SIZE 208 209# open connection cache timeout 210OK`'confMCI_CACHE_TIMEOUT 211 212# use Errors-To: header? 213Ol`'confUSE_ERRORS_TO 214 215# log level 216OL`'confLOG_LEVEL 217 218# send to me too, even in an alias expansion? 219Om`'confME_TOO 220 221# verify RHS in newaliases? 222On`'confCHECK_ALIASES 223 224# default messages to old style headers if no special punctuation? 225Oo`'confOLD_STYLE_HEADERS 226 227# SMTP daemon options 228ifdef(`confDAEMON_OPTIONS', 229 OO`'confDAEMON_OPTIONS, 230 #OOPort=esmtp) 231 232# privacy flags 233Op`'confPRIVACY_FLAGS 234 235# who (if anyone) should get extra copies of error messages 236ifdef(`confCOPY_ERRORS_TO', 237 OP`'confCOPY_ERRORS_TO, 238 #OPPostmaster) 239 240# slope of queue-only function 241ifdef(`confQUEUE_FACTOR', 242 Oq`'confQUEUE_FACTOR, 243 #Oq600000) 244 245# queue directory 246OQ`'ifdef(`QUEUE_DIR', QUEUE_DIR, /var/spool/mqueue) 247 248# read timeout -- now OK per RFC 1123 section 5.3.2 249ifdef(`confREAD_TIMEOUT', 250 Or`'confREAD_TIMEOUT, 251 #Ordatablock=10m) 252 253# queue up everything before forking? 254Os`'confSAFE_QUEUE 255 256# status file 257OS`'ifdef(`STATUS_FILE', STATUS_FILE, /etc/sendmail.st) 258 259# default message timeout interval 260OT`'confMESSAGE_TIMEOUT 261 262# time zone handling: 263# if undefined, use system default 264# if defined but null, use TZ envariable passed in 265# if defined and non-null, use that info 266ifelse(confTIME_ZONE, `USE_SYSTEM', `#Ot', 267 confTIME_ZONE, `USE_TZ', `Ot', 268 `Ot`'confTIME_ZONE') 269 270# default UID 271Ou`'confDEF_USER_ID 272 273# list of locations of user database file (null means no lookup) 274OU`'ifdef(`confUSERDB_SPEC', `confUSERDB_SPEC') 275 276# fallback MX host 277ifdef(`confFALLBACK_MX', 278 OV`'confFALLBACK_MX, 279 #OVfall.back.host.net) 280 281# if we are the best MX host for a site, try it directly instead of config err 282Ow`'confTRY_NULL_MX_LIST 283 284# load average at which we just queue messages 285Ox`'confQUEUE_LA 286 287# load average at which we refuse connections 288OX`'confREFUSE_LA 289 290# work recipient factor 291ifdef(`confWORK_RECIPIENT_FACTOR', 292 Oy`'confWORK_RECIPIENT_FACTOR, 293 #Oy30000) 294 295# deliver each queued job in a separate process? 296OY`'confSEPARATE_PROC 297 298# work class factor 299ifdef(`confWORK_CLASS_FACTOR', 300 Oz`'confWORK_CLASS_FACTOR, 301 #Oz1800) 302 303# work time factor 304ifdef(`confWORK_TIME_FACTOR', 305 OZ`'confWORK_TIME_FACTOR, 306 #OZ90000) 307 308# do our SMTP peers choke on multi-line greeting messages? 309O BrokenSmtpPeers=confBROKEN_SMTP_PEERS 310 311# shall we sort the queue by hostname first? 312O SortQueueByHost=confSORT_QUEUE_BY_HOST 313 314########################### 315# Message precedences # 316########################### 317 318Pfirst-class=0 319Pspecial-delivery=100 320Plist=-30 321Pbulk=-60 322Pjunk=-100 323 324##################### 325# Trusted users # 326##################### 327 328Troot 329Tdaemon 330Tuucp 331 332######################### 333# Format of headers # 334######################### 335 336H?P?Return-Path: $g 337HReceived: $?sfrom $s $.$?_($?s$|from $.$_) $.by $j ($v/$Z)$?r with $r$. id $i$?u for $u$.; $b 338H?D?Resent-Date: $a 339H?D?Date: $a 340H?F?Resent-From: $q 341H?F?From: $q 342H?x?Full-Name: $x 343HSubject: 344# HPosted-Date: $a 345# H?l?Received-Date: $b 346H?M?Resent-Message-Id: <$t.$i@$j> 347H?M?Message-Id: <$t.$i@$j> 348# 349###################################################################### 350###################################################################### 351##### 352##### REWRITING RULES 353##### 354###################################################################### 355###################################################################### 356 357undivert(9)dnl 358 359########################################### 360### Rulset 3 -- Name Canonicalization ### 361########################################### 362S3 363 364# handle null input (translate to <@> special case) 365R$@ $@ <@> 366 367# basic textual canonicalization -- note RFC733 heuristic here 368R$*<$*>$*<$*>$* $2$3<$4>$5 strip multiple <> <> 369R$*<$*<$+>$*>$* <$3>$5 2-level <> nesting 370R$*<>$* $@ <@> MAIL FROM:<> case 371R$*<$+>$* $2 basic RFC821/822 parsing 372 373# handle list:; syntax as special case 374R$*:;$* $@ $1 :; <@> 375 376# make sure <@a,@b,@c:user@d> syntax is easy to parse -- undone later 377R@ $+ , $+ @ $1 : $2 change all "," to ":" 378 379# localize and dispose of route-based addresses 380R@ $+ : $+ $@ $>96 < @$1 > : $2 handle <route-addr> 381 382# find focus for list syntax 383R $+ : $* ; @ $+ $@ $>96 $1 : $2 ; < @ $3 > list syntax 384R $+ : $* ; $@ $1 : $2; list syntax 385 386# find focus for @ syntax addresses 387R$+ @ $+ $: $1 < @ $2 > focus on domain 388R$+ < $+ @ $+ > $1 $2 < @ $3 > move gaze right 389R$+ < @ $+ > $@ $>96 $1 < @ $2 > already canonical 390 391# do some sanity checking 392R$* < @ $* : $* > $* $1 < @ $2 $3 > $4 nix colons in addrs 393 394ifdef(`_NO_UUCP_', `dnl', 395`# convert old-style addresses to a domain-based address 396R$- ! $+ $@ $>96 $2 < @ $1 .UUCP > resolve uucp names 397R$+ . $- ! $+ $@ $>96 $3 < @ $1 . $2 > domain uucps 398R$+ ! $+ $@ $>96 $2 < @ $1 .UUCP > uucp subdomains') 399 400# if we have % signs, take the rightmost one 401R$* % $* $1 @ $2 First make them all @s. 402R$* @ $* @ $* $1 % $2 @ $3 Undo all but the last. 403R$* @ $* $@ $>96 $1 < @ $2 > Insert < > and finish 404 405# else we must be a local name 406 407 408################################################ 409### Ruleset 96 -- bottom half of ruleset 3 ### 410################################################ 411 412# At this point, everything should be in a "local_part<@domain>extra" format. 413S96 414 415# handle special cases for local names 416R$* < @ localhost > $* $: $1 < @ $j . > $2 no domain at all 417R$* < @ localhost . $m > $* $: $1 < @ $j . > $2 local domain 418ifdef(`_NO_UUCP_', `dnl', 419`R$* < @ localhost . UUCP > $* $: $1 < @ $j . > $2 .UUCP domain') 420R$* < @ [ $+ ] > $* $: $1 < @@ [ $2 ] > $3 mark [a.b.c.d] 421R$* < @@ $=w > $* $: $1 < @ $j . > $3 self-literal 422R$* < @@ $+ > $* $@ $1 < @ $2 > $3 canon IP addr 423ifdef(`DOMAIN_TABLE', ` 424# look up domains in the domain table 425R$* < @ $+ > $* $: $1 < @ $(domaintable $2 $) > $3', 426`dnl') 427undivert(2)dnl 428 429ifdef(`_NO_UUCP_', `dnl', 430`ifdef(`UUCP_RELAY', 431`# pass UUCP addresses straight through 432R$* < @ $+ . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', 433`# if really UUCP, handle it immediately 434ifdef(`_CLASS_U_', 435`R$* < @ $=U . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl') 436ifdef(`_CLASS_V_', 437`R$* < @ $=V . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl') 438ifdef(`_CLASS_W_', 439`R$* < @ $=W . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl') 440ifdef(`_CLASS_X_', 441`R$* < @ $=X . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl') 442ifdef(`_CLASS_Y_', 443`R$* < @ $=Y . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl') 444 445# try UUCP traffic as a local address 446R$* < @ $+ . UUCP > $* $: $1 < @ $[ $2 $] . UUCP . > $3 447R$* < @ $+ . . UUCP . > $* $@ $1 < @ $2 . > $3') 448') 449ifdef(`_NO_CANONIFY_', `dnl', 450`# pass to name server to make hostname canonical 451R$* < @ $* $~P > $* $: $1 < @ $[ $2 $3 $] > $4') 452 453# local host aliases and pseudo-domains are always canonical 454R$* < @ $=w > $* $: $1 < @ $2 . > $3 455R$* < @ $* $=P > $* $: $1 < @ $2 $3 . > $4 456R$* < @ $* . . > $* $1 < @ $2 . > $3 457 458# if this is the local hostname, make sure we treat is as canonical 459R$* < @ $j > $* $: $1 < @ $j . > $2 460 461 462################################################## 463### Ruleset 4 -- Final Output Post-rewriting ### 464################################################## 465S4 466 467R$*<@> $@ $1 handle <> and list:; 468 469# strip trailing dot off possibly canonical name 470R$* < @ $+ . > $* $1 < @ $2 > $3 471 472# externalize local domain info 473R$* < $+ > $* $1 $2 $3 defocus 474R@ $+ : @ $+ : $+ @ $1 , @ $2 : $3 <route-addr> canonical 475R@ $* $@ @ $1 ... and exit 476 477ifdef(`_NO_UUCP_', `dnl', 478`# UUCP must always be presented in old form 479R$+ @ $- . UUCP $2!$1 u@h.UUCP => h!u') 480 481# delete duplicate local names 482R$+ % $=w @ $=w $1 @ $j u%host@host => u@host 483 484 485 486############################################################## 487### Ruleset 97 -- recanonicalize and call ruleset zero ### 488### (used for recursive calls) ### 489############################################################## 490 491S`'97 492R$* $: $>3 $1 493R$* $@ $>0 $1 494 495 496###################################### 497### Ruleset 0 -- Parse Address ### 498###################################### 499 500S0 501 502R<@> $#_LOCAL_ $: <@> special case error msgs 503R$* : $* ; $#error $@ USAGE $: "list:; syntax illegal for recipient addresses" 504R<@ $+> $#error $@ USAGE $: "user address required" 505R$* <$* : $* > $* $#error $@ USAGE $: "colon illegal in host name part" 506R$* < @ . > $* $#error $@ USAGE $: "invalid host name" 507 508ifdef(`_MAILER_smtp_', 509`# handle numeric address spec 510R$* < @ [ $+ ] > $* $: $>98 $1 < @ [ $2 ] > $3 numeric internet spec 511R$* < @ [ $+ ] > $* $#_SMTP_ $@ [$2] $: $1 < @ [$2] > $3 still numeric: send', 512 `dnl') 513 514# now delete the local info -- note $=O to find characters that cause forwarding 515R$* < @ > $* $@ $>97 $1 user@ => user 516R< @ $=w . > : $* $@ $>97 $2 @here:... -> ... 517R$* $=O $* < @ $=w . > $@ $>97 $1 $2 $3 ...@here -> ... 518 519# handle local hacks 520R$* $: $>98 $1 521 522# short circuit local delivery so forwarded email works 523ifdef(`_LOCAL_NOT_STICKY_', 524`R$=L < @ $=w . > $#_LOCAL_ $: @ $1 special local names 525R$+ < @ $=w . > $#_LOCAL_ $: $1 dispose directly', 526`R$+ < @ $=w . > $: $1 < @ $2 . @ $H > first try hub 527R$+ < $+ @ $+ > $#_LOCAL_ $: $1 yep .... 528R$=D . $+ < $+ @ > $#_LOCAL_ $: $1 . $2 dotted name? 529R$+ < $+ @ > $#_LOCAL_ $: @ $1 nope, local address') 530ifdef(`MAILER_TABLE', 531` 532# not local -- try mailer table lookup 533R$* <@ $+ > $* $: < $2 > $1 < @ $2 > $3 extract host name 534R< $+ . > $* $: < $1 > $2 strip trailing dot 535R< $+ > $* $: < $(mailertable $1 $) > $2 lookup 536R< $- : $+ > $* $# $1 $@ $2 $: $3 check -- resolved? 537R< $+ > $* $: $>90 <$1> $2 try domain', 538`dnl') 539undivert(4)dnl 540 541ifdef(`_NO_UUCP_', `dnl', 542`# resolve remotely connected UUCP links (if any) 543ifdef(`_CLASS_V_', 544`R$* < @ $=V . UUCP . > $* $: $>95 < $V > $1 <@$2.UUCP.> $3', 545 `dnl') 546ifdef(`_CLASS_W_', 547`R$* < @ $=W . UUCP . > $* $: $>95 < $W > $1 <@$2.UUCP.> $3', 548 `dnl') 549ifdef(`_CLASS_X_', 550`R$* < @ $=X . UUCP . > $* $: $>95 < $X > $1 <@$2.UUCP.> $3', 551 `dnl')') 552 553# resolve fake top level domains by forwarding to other hosts 554ifdef(`BITNET_RELAY', 555`R$*<@$+.BITNET.>$* $: $>95 < $B > $1 <@$2.BITNET.> $3 user@host.BITNET', 556 `dnl') 557ifdef(`_MAILER_pop_', 558`R$+ < @ POP. > $#pop $: $1 user@POP', 559 `dnl') 560ifdef(`_MAILER_fax_', 561`R$+ < @ $+ .FAX. > $#fax $@ $2 $: $1 user@host.FAX', 562`ifdef(`FAX_RELAY', 563`R$*<@$+.FAX.>$* $: $>95 < $F > $1 <@$2.FAX.> $3 user@host.FAX', 564 `dnl')') 565 566ifdef(`UUCP_RELAY', 567`# forward non-local UUCP traffic to our UUCP relay 568R$*<@$*.UUCP.>$* $: $>95 < $Y > $1 <@$2.UUCP.> $3 uucp mail', 569`ifdef(`_MAILER_uucp_', 570`# forward other UUCP traffic straight to UUCP 571R$* < @ $+ .UUCP. > $* $#uucp $@ $2 $: $1 < @ $2 .UUCP. > $3 user@host.UUCP', 572 `dnl')') 573ifdef(`_MAILER_usenet_', ` 574# addresses sent to net.group.USENET will get forwarded to a newsgroup 575R$+ . USENET $#usenet $: $1', 576 `dnl') 577 578ifdef(`_LOCAL_RULES_', 579`# figure out what should stay in our local mail system 580undivert(1)', `dnl') 581 582# pass names that still have a host to a smarthost (if defined) 583R$* < @ $* > $* $: $>95 < $S > $1 < @ $2 > $3 glue on smarthost name 584 585# deal with other remote names 586ifdef(`_MAILER_smtp_', 587`R$* < @$* > $* $#_SMTP_ $@ $2 $: $1 < @ $2 > $3 user@host.domain', 588`R$* < @$* > $* $#error $@NOHOST $: Unrecognized host name $2') 589 590# if this is quoted, strip the quotes and try again 591R$+ $: $(dequote $1 $) strip quotes 592R$+ $=O $+ $@ $>97 $1 $2 $3 try again 593 594# handle locally delivered names 595R$=L $#_LOCAL_ $: @ $1 special local names 596R$+ $#_LOCAL_ $: $1 regular local names 597 598########################################################################### 599### Ruleset 5 -- special rewriting after aliases have been expanded ### 600### (new sendmail only) ### 601########################################################################### 602 603S5 604 605# if we have a "special dotted user", convert it back to the base name 606R$=D . * $#_LOCAL_ $: $1 607R$=D . $+ $#_LOCAL_ $: $1 . * 608 609# see if we have a relay or a hub 610R$+ $: < $R > $1 try relay 611R< > $+ $: < $H > $1 try hub 612R< > $+ $@ $1 nope, give up 613R< $- : $+ > $+ $: $>95 < $1 : $2 > $3 < @ $2 > 614R< $+ > $+ $@ $>95 < $1 > $2 < @ $1 > 615ifdef(`MAILER_TABLE', 616` 617 618################################################################### 619### Ruleset 90 -- try domain part of mailertable entry ### 620### (new sendmail only) ### 621################################################################### 622 623S90 624R$* <$- . $+ > $* $: $1$2 < $(mailertable .$3 $@ $1$2 $@ $2 $) > $4 625R$* <$- : $+ > $* $# $2 $@ $3 $: $4 check -- resolved? 626R$* < . $+ > $* $@ $>90 $1 . <$2> $3 no -- strip & try again 627R$* < $* > $* $: < $(mailertable . $@ $1$2 $) > $3 try "." 628R<$- : $+ > $* $# $1 $@ $2 $: $3 "." found? 629R< $* > $* $@ $2 no mailertable match', 630`dnl') 631 632################################################################### 633### Ruleset 95 -- canonify mailer:host syntax to triple ### 634################################################################### 635 636S95 637R< > $* $@ $1 strip off null relay 638R< $- : $+ > $* $# $1 $@ $2 $: $3 try qualified mailer 639R< $=w > $* $@ $2 delete local host 640R< $+ > $* $#_RELAY_ $@ $1 $: $2 use unqualified mailer 641 642################################################################### 643### Ruleset 98 -- local part of ruleset zero (can be null) ### 644################################################################### 645 646S98 647undivert(3)dnl 648# 649###################################################################### 650###################################################################### 651##### 652`##### MAILER DEFINITIONS' 653##### 654###################################################################### 655###################################################################### 656undivert(7)dnl 657