1 SENDMAIL(8) SENDMAIL(8)
6 sendmail - an electronic mail transport agent
8 S
\bSY
\bYN
\bNO
\bOP
\bPS
\bSI
\bIS
\bS
9 s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl [_
\bf_
\bl_
\ba_
\bg_
\bs] [_
\ba_
\bd_
\bd_
\br_
\be_
\bs_
\bs _
\b._
\b._
\b.]
10 n
\bne
\bew
\bwa
\bal
\bli
\bia
\bas
\bse
\bes
\bs
11 m
\bma
\bai
\bil
\blq
\bq [-
\b-v
\bv]
12 h
\bho
\bos
\bst
\bts
\bst
\bta
\bat
\bt
13 p
\bpu
\bur
\brg
\bge
\bes
\bst
\bta
\bat
\bt
16 D
\bDE
\bES
\bSC
\bCR
\bRI
\bIP
\bPT
\bTI
\bIO
\bON
\bN
17 S
\bSe
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl sends a message to one or more _
\br_
\be_
\bc_
\bi_
\bp_
\bi_
\be_
\bn_
\bt_
\bs_
\b, routing the message
18 over whatever networks are necessary. S
\bSe
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl does internetwork for-
19 warding as necessary to deliver the message to the correct place.
21 S
\bSe
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl is not intended as a user interface routine; other programs
22 provide user-friendly front ends; s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl is used only to deliver pre-
25 With no flags, s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl reads its standard input up to an end-of-file
26 or a line consisting only of a single dot and sends a copy of the mes-
27 sage found there to all of the addresses listed. It determines the
28 network(s) to use based on the syntax and contents of the addresses.
30 Local addresses are looked up in a file and aliased appropriately.
31 Aliasing can be prevented by preceding the address with a backslash.
32 Beginning with 8.10, the sender is included in any alias expansions,
33 e.g., if `john' sends to `group', and `group' includes `john' in the
34 expansion, then the letter will also be delivered to `john'.
36 P
\bPa
\bar
\bra
\bam
\bme
\bet
\bte
\ber
\brs
\bs
37 -
\b-A
\bAc
\bc Use submit.cf even if the operation mode does not indicate an
38 initial mail submission.
40 -
\b-A
\bAm
\bm Use sendmail.cf even if the operation mode indicates an initial
43 -
\b-B
\bB_
\bt_
\by_
\bp_
\be Set the body type to _
\bt_
\by_
\bp_
\be. Current legal values are 7BIT or
46 -
\b-b
\bba
\ba Go into ARPANET mode. All input lines must end with a CR-LF,
47 and all messages will be generated with a CR-LF at the end.
48 Also, the ``From:'' and ``Sender:'' fields are examined for the
51 -
\b-b
\bbd
\bd Run as a daemon. S
\bSe
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl will fork and run in background lis-
52 tening on socket 25 for incoming SMTP connections. This is nor-
53 mally run from /etc/rc.
55 -
\b-b
\bbD
\bD Same as -
\b-b
\bbd
\bd except runs in foreground.
57 -
\b-b
\bbh
\bh Print the persistent host status database.
59 -
\b-b
\bbH
\bH Purge expired entries from the persistent host status database.
61 -
\b-b
\bbi
\bi Initialize the alias database.
63 -
\b-b
\bbm
\bm Deliver mail in the usual way (default).
65 -
\b-b
\bbp
\bp Print a listing of the queue(s).
67 -
\b-b
\bbP
\bP Print number of entries in the queue(s); only available with
68 shared memory support.
70 -
\b-b
\bbs
\bs Use the SMTP protocol as described in RFC821 on standard input
71 and output. This flag implies all the operations of the -
\b-b
\bba
\ba
72 flag that are compatible with SMTP.
74 -
\b-b
\bbt
\bt Run in address test mode. This mode reads addresses and shows
75 the steps in parsing; it is used for debugging configuration
78 -
\b-b
\bbv
\bv Verify names only - do not try to collect or deliver a message.
79 Verify mode is normally used for validating users or mailing
82 -
\b-C
\bC_
\bf_
\bi_
\bl_
\be Use alternate configuration file. S
\bSe
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl gives up any
83 enhanced (set-user-ID or set-group-ID) privileges if an alter-
84 nate configuration file is specified.
86 -
\b-D
\bD _
\bl_
\bo_
\bg_
\bf_
\bi_
\bl_
\be
87 Send debugging output to the indicated log file instead of std-
90 -
\b-d
\bd_
\bc_
\ba_
\bt_
\be_
\bg_
\bo_
\br_
\by.
\b._
\bl_
\be_
\bv_
\be_
\bl_
\b._
\b._
\b.
91 Set the debugging flag for _
\bc_
\ba_
\bt_
\be_
\bg_
\bo_
\br_
\by to _
\bl_
\be_
\bv_
\be_
\bl. _
\bC_
\ba_
\bt_
\be_
\bg_
\bo_
\br_
\by is
92 either an integer or a name specifying the topic, and _
\bl_
\be_
\bv_
\be_
\bl an
93 integer specifying the level of debugging output desired.
94 Higher levels generally mean more output. More than one flag
95 can be specified by separating them with commas. A list of
96 numeric debugging categories can be found in the TRACEFLAGS file
97 in the sendmail source distribution.
98 The option -
\b-d
\bd0
\b0.
\b.1
\b1 prints the version of s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl and the options
100 Most other categories are only useful with, and documented in,
101 s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl's source code.
103 -
\b-F
\bF_
\bf_
\bu_
\bl_
\bl_
\bn_
\ba_
\bm_
\be
104 Set the full name of the sender.
106 -
\b-f
\bf_
\bn_
\ba_
\bm_
\be Sets the name of the ``from'' person (i.e., the envelope sender
107 of the mail). This address may also be used in the From: header
108 if that header is missing during initial submission. The enve-
109 lope sender address is used as the recipient for delivery status
110 notifications and may also appear in a Return-Path: header. -
\b-f
\bf
111 should only be used by ``trusted'' users (normally _
\br_
\bo_
\bo_
\bt, _
\bd_
\ba_
\be_
\bm_
\bo_
\bn,
112 and _
\bn_
\be_
\bt_
\bw_
\bo_
\br_
\bk) or if the person you are trying to become is the
113 same as the person you are. Otherwise, an X-Authentication-
114 Warning header will be added to the message.
116 -
\b-G
\bG Relay (gateway) submission of a message, e.g., when r
\brm
\bma
\bai
\bil
\bl calls
117 s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl .
\b.
119 -
\b-h
\bh_
\bN Set the hop count to _
\bN. The hop count is incremented every time
120 the mail is processed. When it reaches a limit, the mail is
121 returned with an error message, the victim of an aliasing loop.
122 If not specified, ``Received:'' lines in the message are
125 -
\b-i
\bi Do not strip a leading dot from lines in incoming messages, and
126 do not treat a dot on a line by itself as the end of an incoming
127 message. This should be set if you are reading data from a
130 -
\b-L
\bL _
\bt_
\ba_
\bg Set the identifier used in syslog messages to the supplied _
\bt_
\ba_
\bg.
132 -
\b-N
\bN _
\bd_
\bs_
\bn Set delivery status notification conditions to _
\bd_
\bs_
\bn, which can be
133 `never' for no notifications or a comma separated list of the
134 values `failure' to be notified if delivery failed, `delay' to
135 be notified if delivery is delayed, and `success' to be notified
136 when the message is successfully delivered.
138 -
\b-n
\bn Don't do aliasing.
140 -
\b-O
\bO _
\bo_
\bp_
\bt_
\bi_
\bo_
\bn=_
\bv_
\ba_
\bl_
\bu_
\be
141 Set option _
\bo_
\bp_
\bt_
\bi_
\bo_
\bn to the specified _
\bv_
\ba_
\bl_
\bu_
\be. This form uses long
142 names. See below for more details.
144 -
\b-o
\bo_
\bx _
\bv_
\ba_
\bl_
\bu_
\be
145 Set option _
\bx to the specified _
\bv_
\ba_
\bl_
\bu_
\be. This form uses single
146 character names only. The short names are not described in this
147 manual page; see the _
\bS_
\be_
\bn_
\bd_
\bm_
\ba_
\bi_
\bl _
\bI_
\bn_
\bs_
\bt_
\ba_
\bl_
\bl_
\ba_
\bt_
\bi_
\bo_
\bn _
\ba_
\bn_
\bd _
\bO_
\bp_
\be_
\br_
\ba_
\bt_
\bi_
\bo_
\bn _
\bG_
\bu_
\bi_
\bd_
\be
150 -
\b-p
\bp_
\bp_
\br_
\bo_
\bt_
\bo_
\bc_
\bo_
\bl
151 Set the name of the protocol used to receive the message. This
152 can be a simple protocol name such as ``UUCP'' or a protocol and
153 hostname, such as ``UUCP:ucbvax''.
155 -
\b-q
\bq[_
\bt_
\bi_
\bm_
\be]
156 Process saved messages in the queue at given intervals. If _
\bt_
\bi_
\bm_
\be
157 is omitted, process the queue once. _
\bT_
\bi_
\bm_
\be is given as a tagged
158 number, with `s' being seconds, `m' being minutes (default), `h'
159 being hours, `d' being days, and `w' being weeks. For example,
160 `-q1h30m' or `-q90m' would both set the timeout to one hour
161 thirty minutes. By default, s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl will run in the back-
162 ground. This option can be used safely with -
\b-b
\bbd
\bd.
164 -
\b-q
\bqp
\bp[_
\bt_
\bi_
\bm_
\be]
165 Similar to -
\b-q
\bq_
\bt_
\bi_
\bm_
\be, except that instead of periodically forking a
166 child to process the queue, sendmail forks a single persistent
167 child for each queue that alternates between processing the
168 queue and sleeping. The sleep time is given as the argument; it
169 defaults to 1 second. The process will always sleep at least 5
170 seconds if the queue was empty in the previous queue run.
172 -
\b-q
\bqf Process saved messages in the queue once and do not fork(), but
173 run in the foreground.
175 -
\b-q
\bqG_
\bn_
\ba_
\bm_
\be
176 Process jobs in queue group called _
\bn_
\ba_
\bm_
\be only.
178 -
\b-q
\bq[_
\b!]I_
\bs_
\bu_
\bb_
\bs_
\bt_
\br
179 Limit processed jobs to those containing _
\bs_
\bu_
\bb_
\bs_
\bt_
\br as a substring
180 of the queue id or not when _
\b! is specified.
182 -
\b-q
\bq[_
\b!]Q_
\bs_
\bu_
\bb_
\bs_
\bt_
\br
183 Limit processed jobs to quarantined jobs containing _
\bs_
\bu_
\bb_
\bs_
\bt_
\br as a
184 substring of the quarantine reason or not when _
\b! is specified.
186 -
\b-q
\bq[_
\b!]R_
\bs_
\bu_
\bb_
\bs_
\bt_
\br
187 Limit processed jobs to those containing _
\bs_
\bu_
\bb_
\bs_
\bt_
\br as a substring
188 of one of the recipients or not when _
\b! is specified.
190 -
\b-q
\bq[_
\b!]S_
\bs_
\bu_
\bb_
\bs_
\bt_
\br
191 Limit processed jobs to those containing _
\bs_
\bu_
\bb_
\bs_
\bt_
\br as a substring
192 of the sender or not when _
\b! is specified.
195 Quarantine a normal queue items with the given reason or unquar-
196 antine quarantined queue items if no reason is given. This
197 should only be used with some sort of item matching using as
200 -
\b-R
\bR _
\br_
\be_
\bt_
\bu_
\br_
\bn
201 Set the amount of the message to be returned if the message
202 bounces. The _
\br_
\be_
\bt_
\bu_
\br_
\bn parameter can be `full' to return the
203 entire message or `hdrs' to return only the headers. In the
204 latter case also local bounces return only the headers.
206 -
\b-r
\br_
\bn_
\ba_
\bm_
\be An alternate and obsolete form of the -
\b-f
\bf flag.
208 -
\b-t
\bt Read message for recipients. To:, Cc:, and Bcc: lines will be
209 scanned for recipient addresses. The Bcc: line will be deleted
212 -
\b-V
\bV _
\be_
\bn_
\bv_
\bi_
\bd
213 Set the original envelope id. This is propagated across SMTP to
214 servers that support DSNs and is returned in DSN-compliant error
217 -
\b-v
\bv Go into verbose mode. Alias expansions will be announced, etc.
219 -
\b-X
\bX _
\bl_
\bo_
\bg_
\bf_
\bi_
\bl_
\be
220 Log all traffic in and out of mailers in the indicated log file.
221 This should only be used as a last resort for debugging mailer
222 bugs. It will log a lot of data very quickly.
224 -
\b--
\b- Stop processing command flags and use the rest of the arguments
227 O
\bOp
\bpt
\bti
\bio
\bon
\bns
\bs
228 There are also a number of processing options that may be set. Nor-
229 mally these will only be used by a system administrator. Options may
230 be set either on the command line using the -
\b-o
\bo flag (for short names),
231 the -
\b-O
\bO flag (for long names), or in the configuration file. This is a
232 partial list limited to those options that are likely to be useful on
233 the command line and only shows the long names; for a complete list
234 (and details), consult the _
\bS_
\be_
\bn_
\bd_
\bm_
\ba_
\bi_
\bl _
\bI_
\bn_
\bs_
\bt_
\ba_
\bl_
\bl_
\ba_
\bt_
\bi_
\bo_
\bn _
\ba_
\bn_
\bd _
\bO_
\bp_
\be_
\br_
\ba_
\bt_
\bi_
\bo_
\bn _
\bG_
\bu_
\bi_
\bd_
\be.
237 AliasFile=_
\bf_
\bi_
\bl_
\be
238 Use alternate alias file.
241 On mailers that are considered ``expensive'' to connect to,
242 don't initiate immediate connection. This requires queueing.
244 CheckpointInterval=_
\bN
245 Checkpoint the queue file after every _
\bN successful deliveries
246 (default 10). This avoids excessive duplicate deliveries when
247 sending to long mailing lists interrupted by system crashes.
250 Set the delivery mode to _
\bx. Delivery modes are `i' for interac-
251 tive (synchronous) delivery, `b' for background (asynchronous)
252 delivery, `q' for queue only - i.e., actual delivery is done the
253 next time the queue is run, and `d' for deferred - the same as
254 `q' except that database lookups for maps which have set the -D
255 option (default for the host map) are avoided.
258 Set error processing to mode _
\bx. Valid modes are `m' to mail
259 back the error message, `w' to ``write'' back the error message
260 (or mail it back if the sender is not logged in), `p' to print
261 the errors on the terminal (default), `q' to throw away error
262 messages (only exit status is returned), and `e' to do special
263 processing for the BerkNet. If the text of the message is not
264 mailed back by modes `m' or `w' and if the sender is local to
265 this machine, a copy of the message is appended to the file
266 _
\bd_
\be_
\ba_
\bd_
\b._
\bl_
\be_
\bt_
\bt_
\be_
\br in the sender's home directory.
269 Save UNIX-style From lines at the front of messages.
272 The maximum number of times a message is allowed to ``hop''
273 before we decide it is in a loop.
276 Do not take dots on a line by themselves as a message termina-
280 Send error messages in MIME format. If not set, the DSN (Deliv-
281 ery Status Notification) SMTP extension is disabled.
283 ConnectionCacheTimeout=_
\bt_
\bi_
\bm_
\be_
\bo_
\bu_
\bt
284 Set connection cache timeout.
286 ConnectionCacheSize=_
\bN
287 Set connection cache size.
292 MeToo=_
\bF_
\ba_
\bl_
\bs_
\be
293 Don't send to ``me'' (the sender) if I am in an alias expansion.
296 Validate the right hand side of aliases during a newaliases(1)
300 If set, this message may have old style headers. If not set,
301 this message is guaranteed to have new style headers (i.e., com-
302 mas instead of spaces between addresses). If set, an adaptive
303 algorithm is used that will correctly determine the header for-
306 QueueDirectory=_
\bq_
\bu_
\be_
\bu_
\be_
\bd_
\bi_
\br
307 Select the directory in which to queue messages.
309 StatusFile=_
\bf_
\bi_
\bl_
\be
310 Save statistics in the named file.
312 Timeout.queuereturn=_
\bt_
\bi_
\bm_
\be
313 Set the timeout on undelivered messages in the queue to the
314 specified time. After delivery has failed (e.g., because of a
315 host being down) for this amount of time, failed messages will
316 be returned to the sender. The default is five days.
318 UserDatabaseSpec=_
\bu_
\bs_
\be_
\br_
\bd_
\ba_
\bt_
\ba_
\bb_
\ba_
\bs_
\be
319 If set, a user database is consulted to get forwarding informa-
320 tion. You can consider this an adjunct to the aliasing mecha-
321 nism, except that the database is intended to be distributed;
322 aliases are local to a particular host. This may not be avail-
323 able if your sendmail does not have the USERDB option compiled
327 Fork each job during queue runs. May be convenient on memory-
331 Strip incoming messages to seven bits.
333 EightBitMode=_
\bm_
\bo_
\bd_
\be
334 Set the handling of eight bit input to seven bit destinations to
335 _
\bm_
\bo_
\bd_
\be: m (mimefy) will convert to seven-bit MIME format, p (pass)
336 will pass it as eight bits (but violates protocols), and s
337 (strict) will bounce the message.
339 MinQueueAge=_
\bt_
\bi_
\bm_
\be_
\bo_
\bu_
\bt
340 Sets how long a job must ferment in the queue between attempts
343 DefaultCharSet=_
\bc_
\bh_
\ba_
\br_
\bs_
\be_
\bt
344 Sets the default character set used to label 8-bit data that is
345 not otherwise labelled.
347 DialDelay=_
\bs_
\bl_
\be_
\be_
\bp_
\bt_
\bi_
\bm_
\be
348 If opening a connection fails, sleep for _
\bs_
\bl_
\be_
\be_
\bp_
\bt_
\bi_
\bm_
\be seconds and
349 try again. Useful on dial-on-demand sites.
351 NoRecipientAction=_
\ba_
\bc_
\bt_
\bi_
\bo_
\bn
352 Set the behaviour when there are no recipient headers (To:, Cc:
353 or Bcc:) in the message to _
\ba_
\bc_
\bt_
\bi_
\bo_
\bn: none leaves the message
354 unchanged, add-to adds a To: header with the envelope recipi-
355 ents, add-apparently-to adds an Apparently-To: header with the
356 envelope recipients, add-bcc adds an empty Bcc: header, and add-
357 to-undisclosed adds a header reading `To: undisclosed-recipi-
360 MaxDaemonChildren=_
\bN
361 Sets the maximum number of children that an incoming SMTP daemon
362 will allow to spawn at any time to _
\bN.
364 ConnectionRateThrottle=_
\bN
365 Sets the maximum number of connections per second to the SMTP
368 In aliases, the first character of a name may be a vertical bar to
369 cause interpretation of the rest of the name as a command to pipe the
370 mail to. It may be necessary to quote the name to keep s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl from
371 suppressing the blanks from between arguments. For example, a common
374 msgs: "|/usr/bin/msgs -s"
376 Aliases may also have the syntax ``:include:_
\bf_
\bi_
\bl_
\be_
\bn_
\ba_
\bm_
\be'' to ask s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl
377 to read the named file for a list of recipients. For example, an alias
380 poets: ":include:/usr/local/lib/poets.list"
382 would read _
\b/_
\bu_
\bs_
\br_
\b/_
\bl_
\bo_
\bc_
\ba_
\bl_
\b/_
\bl_
\bi_
\bb_
\b/_
\bp_
\bo_
\be_
\bt_
\bs_
\b._
\bl_
\bi_
\bs_
\bt for the list of addresses making
385 S
\bSe
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl returns an exit status describing what it did. The codes are
386 defined in <_
\bs_
\by_
\bs_
\be_
\bx_
\bi_
\bt_
\bs_
\b._
\bh>:
388 EX_OK Successful completion on all addresses.
391 User name not recognized.
394 Catchall meaning necessary resources were not available.
397 Syntax error in address.
400 Internal software error, including bad arguments.
403 Temporary operating system error, such as ``cannot fork''.
406 Host name not recognized.
409 Message could not be sent immediately, but was queued.
411 If invoked as n
\bne
\bew
\bwa
\bal
\bli
\bia
\bas
\bse
\bes
\bs, s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl will rebuild the alias database. If
412 invoked as m
\bma
\bai
\bil
\blq
\bq, s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl will print the contents of the mail queue.
413 If invoked as h
\bho
\bos
\bst
\bts
\bst
\bta
\bat
\bt, s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl will print the persistent host status
414 database. If invoked as p
\bpu
\bur
\brg
\bge
\bes
\bst
\bta
\bat
\bt, s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl will purge expired entries
415 from the persistent host status database. If invoked as s
\bsm
\bmt
\btp
\bpd
\bd, s
\bse
\ben
\bnd
\bd-
\b-
416 m
\bma
\bai
\bil
\bl will act as a daemon, as if the -
\b-b
\bbd
\bd option were specified.
419 s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl often gets blamed for many problems that are actually the
420 result of other problems, such as overly permissive modes on directo-
421 ries. For this reason, s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl checks the modes on system directories
422 and files to determine if they can be trusted. Although these checks
423 can be turned off and your system security reduced by setting the D
\bDo
\bon
\bnt
\bt-
\b-
424 B
\bBl
\bla
\bam
\bme
\beS
\bSe
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl option, the permission problems should be fixed. For
425 more information, see:
427 _
\bh_
\bt_
\bt_
\bp_
\b:_
\b/_
\b/_
\bw_
\bw_
\bw_
\b._
\bs_
\be_
\bn_
\bd_
\bm_
\ba_
\bi_
\bl_
\b._
\bo_
\br_
\bg_
\b/_
\bt_
\bi_
\bp_
\bs_
\b/_
\bD_
\bo_
\bn_
\bt_
\bB_
\bl_
\ba_
\bm_
\be_
\bS_
\be_
\bn_
\bd_
\bm_
\ba_
\bi_
\bl_
\b._
\bh_
\bt_
\bm_
\bl
430 Except for the file _
\b/_
\be_
\bt_
\bc_
\b/_
\bm_
\ba_
\bi_
\bl_
\b/_
\bs_
\be_
\bn_
\bd_
\bm_
\ba_
\bi_
\bl_
\b._
\bc_
\bf itself the following path-
431 names are all specified in _
\b/_
\be_
\bt_
\bc_
\b/_
\bm_
\ba_
\bi_
\bl_
\b/_
\bs_
\be_
\bn_
\bd_
\bm_
\ba_
\bi_
\bl_
\b._
\bc_
\bf. Thus, these values
432 are only approximations.
436 raw data for alias names
439 data base of alias names
441 /etc/mail/sendmail.cf
453 S
\bSE
\bEE
\bE A
\bAL
\bLS
\bSO
\bO
454 binmail(1), mail(1), rmail(1), syslog(3), aliases(5), mailaddr(7),
457 DARPA Internet Request For Comments _
\bR_
\bF_
\bC_
\b8_
\b1_
\b9, _
\bR_
\bF_
\bC_
\b8_
\b2_
\b1, _
\bR_
\bF_
\bC_
\b8_
\b2_
\b2. _
\bS_
\be_
\bn_
\bd_
\bm_
\ba_
\bi_
\bl
458 _
\bI_
\bn_
\bs_
\bt_
\ba_
\bl_
\bl_
\ba_
\bt_
\bi_
\bo_
\bn _
\ba_
\bn_
\bd _
\bO_
\bp_
\be_
\br_
\ba_
\bt_
\bi_
\bo_
\bn _
\bG_
\bu_
\bi_
\bd_
\be, No. 8, SMM.
460 http://www.sendmail.org/
462 US Patent Numbers 6865671, 6986037.
464 H
\bHI
\bIS
\bST
\bTO
\bOR
\bRY
\bY
465 The s
\bse
\ben
\bnd
\bdm
\bma
\bai
\bil
\bl command appeared in 4.2BSD.
469 $Date: 2011/03/07 23:44:48 $ SENDMAIL(8)