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SENDMAIL(1) SENDMAIL(1)
<b>NAME</b>
sendmail - Postfix to Sendmail compatibility interface
<b>SYNOPSIS</b>
<b>sendmail</b> [<i>option ...</i>] [<i>recipient ...</i>]
<b>mailq</b>
<b>sendmail -bp</b>
<b>newaliases</b>
<b>sendmail -I</b>
<b>DESCRIPTION</b>
The Postfix <a href="sendmail.1.html"><b>sendmail</b>(1)</a> command implements the Postfix to
Sendmail compatibility interface. For the sake of compat-
ibility with existing applications, some Sendmail command-
line options are recognized but silently ignored.
By default, Postfix <a href="sendmail.1.html"><b>sendmail</b>(1)</a> reads a message from stan-
dard input until EOF or until it reads a line with only a
<b>.</b> character, and arranges for delivery. Postfix <a href="sendmail.1.html"><b>send-</b></a>
<a href="sendmail.1.html"><b>mail</b>(1)</a> relies on the <a href="postdrop.1.html"><b>postdrop</b>(1)</a> command to create a
queue file in the <b>maildrop</b> directory.
Specific command aliases are provided for other common
modes of operation:
<b>mailq</b> List the mail queue. Each entry shows the queue
file ID, message size, arrival time, sender, and
the recipients that still need to be delivered. If
mail could not be delivered upon the last attempt,
the reason for failure is shown. The queue ID
string is followed by an optional status character:
<b>*</b> The message is in the <b>active</b> queue, i.e. the
message is selected for delivery.
<b>!</b> The message is in the <b>hold</b> queue, i.e. no
further delivery attempt will be made until
the mail is taken off hold.
This mode of operation is implemented by executing
the <a href="postqueue.1.html"><b>postqueue</b>(1)</a> command.
<b>newaliases</b>
Initialize the alias database. If no input file is
specified (with the <b>-oA</b> option, see below), the
program processes the file(s) specified with the
<b><a href="postconf.5.html#alias_database">alias_database</a></b> configuration parameter. If no
alias database type is specified, the program uses
the type specified with the <b><a href="postconf.5.html#default_database_type">default_database_type</a></b>
configuration parameter. This mode of operation is
implemented by running the <a href="postalias.1.html"><b>postalias</b>(1)</a> command.
Note: it may take a minute or so before an alias
database update becomes visible. Use the "<b>postfix</b>
<b>reload</b>" command to eliminate this delay.
These and other features can be selected by specifying the
appropriate combination of command-line options. Some fea-
tures are controlled by parameters in the <a href="postconf.5.html"><b>main.cf</b></a> configu-
ration file.
The following options are recognized:
<b>-Am</b> (ignored)
<b>-Ac</b> (ignored)
Postfix sendmail uses the same configuration file
regardless of whether or not a message is an ini-
tial submission.
<b>-B</b> <i>body</i><b>_</b><i>type</i>
The message body MIME type: <b>7BIT</b> or <b>8BITMIME</b>.
<b>-bd</b> Go into daemon mode. This mode of operation is
implemented by executing the "<b>postfix start</b>" com-
mand.
<b>-bh</b> (ignored)
<b>-bH</b> (ignored)
Postfix has no persistent host status database.
<b>-bi</b> Initialize alias database. See the <b>newaliases</b> com-
mand above.
<b>-bm</b> Read mail from standard input and arrange for
delivery. This is the default mode of operation.
<b>-bp</b> List the mail queue. See the <b>mailq</b> command above.
<b>-bs</b> Stand-alone SMTP server mode. Read SMTP commands
from standard input, and write responses to stan-
dard output. In stand-alone SMTP server mode, mail
relaying and other access controls are disabled by
default. To enable them, run the process as the
<b><a href="postconf.5.html#mail_owner">mail_owner</a></b> user.
This mode of operation is implemented by running
the <a href="smtpd.8.html"><b>smtpd</b>(8)</a> daemon.
<b>-bv</b> Do not collect or deliver a message. Instead, send
an email report after verifying each recipient
address. This is useful for testing address
rewriting and routing configurations.
This feature is available in Postfix version 2.1
and later.
<b>-C</b> <i>config</i><b>_</b><i>file</i>
<b>-C</b> <i>config</i><b>_</b><i>dir</i>
The path name of the Postfix <a href="postconf.5.html"><b>main.cf</b></a> file, or of
its parent directory. This information is ignored
with Postfix versions before 2.3.
With all Postfix versions, you can specify a direc-
tory pathname with the MAIL_CONFIG environment
variable to override the location of configuration
files.
<b>-F</b> <i>full</i><b>_</b><i>name</i>
Set the sender full name. This overrides the NAME
environment variable, and is used only with mes-
sages that have no <b>From:</b> message header.
<b>-f</b> <i>sender</i>
Set the envelope sender address. This is the
address where delivery problems are sent to. With
Postfix versions before 2.1, the <b>Errors-To:</b> message
header overrides the error return address.
<b>-G</b> Gateway (relay) submission, as opposed to initial
user submission. Either do not rewrite addresses
at all, or update incomplete addresses with the
domain information specified with <b>remote_header_re-</b>
<b>write_domain</b>.
This option is ignored before Postfix version 2.3.
<b>-h</b> <i>hop</i><b>_</b><i>count</i> (ignored)
Hop count limit. Use the <b><a href="postconf.5.html#hopcount_limit">hopcount_limit</a></b> configura-
tion parameter instead.
<b>-I</b> Initialize alias database. See the <b>newaliases</b> com-
mand above.
<b>-i</b> When reading a message from standard input, don't
treat a line with only a <b>.</b> character as the end of
input.
<b>-L</b> <i>label</i> (ignored)
The logging label. Use the <b><a href="postconf.5.html#syslog_name">syslog_name</a></b> configura-
tion parameter instead.
<b>-m</b> (ignored)
Backwards compatibility.
<b>-N</b> <i>dsn</i> (default: 'delay, failure')
Delivery status notification control. Specify
either a comma-separated list with one or more of
<b>failure</b> (send notification when delivery fails),
<b>delay</b> (send notification when delivery is delayed),
or <b>success</b> (send notification when the message is
delivered); or specify <b>never</b> (don't send any noti-
fications at all).
This feature is available in Postfix 2.3 and later.
<b>-n</b> (ignored)
Backwards compatibility.
<b>-oA</b><i>alias</i><b>_</b><i>database</i>
Non-default alias database. Specify <i>pathname</i> or
<i>type</i>:<i>pathname</i>. See <a href="postalias.1.html"><b>postalias</b>(1)</a> for details.
<b>-O</b> <i>option=value</i> (ignored)
Backwards compatibility.
<b>-o7</b> (ignored)
<b>-o8</b> (ignored)
To send 8-bit or binary content, use an appropriate
MIME encapsulation and specify the appropriate <b>-B</b>
command-line option.
<b>-oi</b> When reading a message from standard input, don't
treat a line with only a <b>.</b> character as the end of
input.
<b>-om</b> (ignored)
The sender is never eliminated from alias etc.
expansions.
<b>-o</b> <i>x value</i> (ignored)
Set option <i>x</i> to <i>value</i>. Use the equivalent configu-
ration parameter in <a href="postconf.5.html"><b>main.cf</b></a> instead.
<b>-r</b> <i>sender</i>
Set the envelope sender address. This is the
address where delivery problems are sent to. With
Postfix versions before 2.1, the <b>Errors-To:</b> message
header overrides the error return address.
<b>-R</b> <i>return</i><b>_</b><i>limit</i> (ignored)
Limit the size of bounced mail. Use the
<b><a href="postconf.5.html#bounce_size_limit">bounce_size_limit</a></b> configuration parameter instead.
<b>-q</b> Attempt to deliver all queued mail. This is imple-
mented by executing the <a href="postqueue.1.html"><b>postqueue</b>(1)</a> command.
Warning: flushing undeliverable mail frequently
will result in poor delivery performance of all
other mail.
<b>-q</b><i>interval</i> (ignored)
The interval between queue runs. Use the
<b><a href="postconf.5.html#queue_run_delay">queue_run_delay</a></b> configuration parameter instead.
<b>-qI</b><i>queueid</i>
Schedule immediate delivery of mail with the speci-
fied queue ID. This option is implemented by exe-
cuting the <a href="postqueue.1.html"><b>postqueue</b>(1)</a> command, and is available
with Postfix version 2.4 and later.
<b>-qR</b><i>site</i>
Schedule immediate delivery of all mail that is
queued for the named <i>site</i>. This option accepts only
<i>site</i> names that are eligible for the "fast flush"
service, and is implemented by executing the
<a href="postqueue.1.html"><b>postqueue</b>(1)</a> command. See <a href="flush.8.html"><b>flush</b>(8)</a> for more infor-
mation about the "fast flush" service.
<b>-qS</b><i>site</i>
This command is not implemented. Use the slower
"<b>sendmail -q</b>" command instead.
<b>-t</b> Extract recipients from message headers. These are
added to any recipients specified on the command
line.
With Postfix versions prior to 2.1, this option
requires that no recipient addresses are specified
on the command line.
<b>-U</b> (ignored)
Initial user submission.
<b>-V</b> <i>envid</i>
Specify the envelope ID for notification by servers
that support DSN.
This feature is available in Postfix 2.3 and later.
<b>-XV</b> (Postfix 2.2 and earlier: <b>-V</b>)
Variable Envelope Return Path. Given an envelope
sender address of the form <i>owner-listname</i>@<i>origin</i>,
each recipient <i>user</i>@<i>domain</i> receives mail with a
personalized envelope sender address.
By default, the personalized envelope sender
address is <i>owner-listname</i><b>+</b><i>user</i><b>=</b><i>domain</i>@<i>origin</i>. The
default <b>+</b> and <b>=</b> characters are configurable with
the <b><a href="postconf.5.html#default_verp_delimiters">default_verp_delimiters</a></b> configuration parame-
ter.
<b>-XV</b><i>xy</i> (Postfix 2.2 and earlier: <b>-V</b><i>xy</i>)
As <b>-XV</b>, but uses <i>x</i> and <i>y</i> as the VERP delimiter
characters, instead of the characters specified
with the <b><a href="postconf.5.html#default_verp_delimiters">default_verp_delimiters</a></b> configuration
parameter.
<b>-v</b> Send an email report of the first delivery attempt
(Postfix versions 2.1 and later). Mail delivery
always happens in the background. When multiple <b>-v</b>
options are given, enable verbose logging for
debugging purposes.
<b>-X</b> <i>log</i><b>_</b><i>file</i> (ignored)
Log mailer traffic. Use the <b><a href="postconf.5.html#debug_peer_list">debug_peer_list</a></b> and
<b><a href="postconf.5.html#debug_peer_level">debug_peer_level</a></b> configuration parameters instead.
<b>SECURITY</b>
By design, this program is not set-user (or group) id.
However, it must handle data from untrusted, possibly
remote, users. Thus, the usual precautions need to be
taken against malicious inputs.
<b>DIAGNOSTICS</b>
Problems are logged to <b>syslogd</b>(8) and to the standard
error stream.
<b>ENVIRONMENT</b>
<b>MAIL_CONFIG</b>
Directory with Postfix configuration files.
<b>MAIL_VERBOSE</b> (value does not matter)
Enable verbose logging for debugging purposes.
<b>MAIL_DEBUG</b> (value does not matter)
Enable debugging with an external command, as spec-
ified with the <b><a href="postconf.5.html#debugger_command">debugger_command</a></b> configuration
parameter.
<b>NAME</b> The sender full name. This is used only with mes-
sages that have no <b>From:</b> message header. See also
the <b>-F</b> option above.
<b>CONFIGURATION PARAMETERS</b>
The following <a href="postconf.5.html"><b>main.cf</b></a> parameters are especially relevant
to this program. The text below provides only a parameter
summary. See <a href="postconf.5.html"><b>postconf</b>(5)</a> for more details including exam-
ples.
<b>COMPATIBILITY CONTROLS</b>
Available with Postfix 2.9 and later:
<b><a href="postconf.5.html#sendmail_fix_line_endings">sendmail_fix_line_endings</a> (always)</b>
Controls how the Postfix sendmail command converts
email message line endings from <CR><LF> into UNIX
format (<LF>).
<b>TROUBLE SHOOTING CONTROLS</b>
The <a href="DEBUG_README.html">DEBUG_README</a> file gives examples of how to trouble
shoot a Postfix system.
<b><a href="postconf.5.html#debugger_command">debugger_command</a> (empty)</b>
The external command to execute when a Postfix dae-
mon program is invoked with the -D option.
<b><a href="postconf.5.html#debug_peer_level">debug_peer_level</a> (2)</b>
The increment in verbose logging level when a
remote client or server matches a pattern in the
<a href="postconf.5.html#debug_peer_list">debug_peer_list</a> parameter.
<b><a href="postconf.5.html#debug_peer_list">debug_peer_list</a> (empty)</b>
Optional list of remote client or server hostname
or network address patterns that cause the verbose
logging level to increase by the amount specified
in $<a href="postconf.5.html#debug_peer_level">debug_peer_level</a>.
<b>ACCESS CONTROLS</b>
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#authorized_flush_users">authorized_flush_users</a> (<a href="DATABASE_README.html#types">static</a>:anyone)</b>
List of users who are authorized to flush the
queue.
<b><a href="postconf.5.html#authorized_mailq_users">authorized_mailq_users</a> (<a href="DATABASE_README.html#types">static</a>:anyone)</b>
List of users who are authorized to view the queue.
<b><a href="postconf.5.html#authorized_submit_users">authorized_submit_users</a> (<a href="DATABASE_README.html#types">static</a>:anyone)</b>
List of users who are authorized to submit mail
with the <a href="sendmail.1.html"><b>sendmail</b>(1)</a> command (and with the privi-
leged <a href="postdrop.1.html"><b>postdrop</b>(1)</a> helper command).
<b>RESOURCE AND RATE CONTROLS</b>
<b><a href="postconf.5.html#bounce_size_limit">bounce_size_limit</a> (50000)</b>
The maximal amount of original message text that is
sent in a non-delivery notification.
<b><a href="postconf.5.html#fork_attempts">fork_attempts</a> (5)</b>
The maximal number of attempts to fork() a child
process.
<b><a href="postconf.5.html#fork_delay">fork_delay</a> (1s)</b>
The delay between attempts to fork() a child
process.
<b><a href="postconf.5.html#hopcount_limit">hopcount_limit</a> (50)</b>
The maximal number of Received: message headers
that is allowed in the primary message headers.
<b><a href="postconf.5.html#queue_run_delay">queue_run_delay</a> (300s)</b>
The time between <a href="QSHAPE_README.html#deferred_queue">deferred queue</a> scans by the queue
manager; prior to Postfix 2.4 the default value was
1000s.
<b>FAST FLUSH CONTROLS</b>
The <a href="ETRN_README.html">ETRN_README</a> file describes configuration and operation
details for the Postfix "fast flush" service.
<b><a href="postconf.5.html#fast_flush_domains">fast_flush_domains</a> ($<a href="postconf.5.html#relay_domains">relay_domains</a>)</b>
Optional list of destinations that are eligible for
per-destination logfiles with mail that is queued
to those destinations.
<b>VERP CONTROLS</b>
The <a href="VERP_README.html">VERP_README</a> file describes configuration and operation
details of Postfix support for variable envelope return
path addresses.
<b><a href="postconf.5.html#default_verp_delimiters">default_verp_delimiters</a> (+=)</b>
The two default VERP delimiter characters.
<b><a href="postconf.5.html#verp_delimiter_filter">verp_delimiter_filter</a> (-=+)</b>
The characters Postfix accepts as VERP delimiter
characters on the Postfix <a href="sendmail.1.html"><b>sendmail</b>(1)</a> command line
and in SMTP commands.
<b>MISCELLANEOUS CONTROLS</b>
<b><a href="postconf.5.html#alias_database">alias_database</a> (see 'postconf -d' output)</b>
The alias databases for <a href="local.8.html"><b>local</b>(8)</a> delivery that are
updated with "<b>newaliases</b>" or with "<b>sendmail -bi</b>".
<b><a href="postconf.5.html#command_directory">command_directory</a> (see 'postconf -d' output)</b>
The location of all postfix administrative com-
mands.
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
The default location of the Postfix <a href="postconf.5.html">main.cf</a> and
<a href="master.5.html">master.cf</a> configuration files.
<b><a href="postconf.5.html#daemon_directory">daemon_directory</a> (see 'postconf -d' output)</b>
The directory with Postfix support programs and
daemon programs.
<b><a href="postconf.5.html#default_database_type">default_database_type</a> (see 'postconf -d' output)</b>
The default database type for use in <a href="newaliases.1.html"><b>newaliases</b>(1)</a>,
<a href="postalias.1.html"><b>postalias</b>(1)</a> and <a href="postmap.1.html"><b>postmap</b>(1)</a> commands.
<b><a href="postconf.5.html#delay_warning_time">delay_warning_time</a> (0h)</b>
The time after which the sender receives the mes-
sage headers of mail that is still queued.
<b><a href="postconf.5.html#enable_errors_to">enable_errors_to</a> (no)</b>
Report mail delivery errors to the address speci-
fied with the non-standard Errors-To: message
header, instead of the envelope sender address
(this feature is removed with Postfix version 2.2,
is turned off by default with Postfix version 2.1,
and is always turned on with older Postfix ver-
sions).
<b><a href="postconf.5.html#mail_owner">mail_owner</a> (postfix)</b>
The UNIX system account that owns the Postfix queue
and most Postfix daemon processes.
<b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b>
The location of the Postfix top-level queue direc-
tory.
<b><a href="postconf.5.html#remote_header_rewrite_domain">remote_header_rewrite_domain</a> (empty)</b>
Don't rewrite message headers from remote clients
at all when this parameter is empty; otherwise, re-
write message headers and append the specified
domain name to incomplete addresses.
<b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
The mail system name that is prepended to the
process name in syslog records, so that "smtpd"
becomes, for example, "postfix/smtpd".
<b>FILES</b>
/var/spool/postfix, mail queue
/etc/postfix, configuration files
<b>SEE ALSO</b>
<a href="pickup.8.html">pickup(8)</a>, mail pickup daemon
<a href="qmgr.8.html">qmgr(8)</a>, queue manager
<a href="smtpd.8.html">smtpd(8)</a>, SMTP server
<a href="flush.8.html">flush(8)</a>, fast flush service
<a href="postsuper.1.html">postsuper(1)</a>, queue maintenance
<a href="postalias.1.html">postalias(1)</a>, create/update/query alias database
<a href="postdrop.1.html">postdrop(1)</a>, mail posting utility
<a href="postfix.1.html">postfix(1)</a>, mail system control
<a href="postqueue.1.html">postqueue(1)</a>, mail queue control
syslogd(8), system logging
<b>README_FILES</b>
<a href="DEBUG_README.html">DEBUG_README</a>, Postfix debugging howto
<a href="ETRN_README.html">ETRN_README</a>, Postfix ETRN howto
<a href="VERP_README.html">VERP_README</a>, Postfix VERP howto
<b>LICENSE</b>
The Secure Mailer license must be distributed with this
software.
<b>AUTHOR(S)</b>
Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA
SENDMAIL(1)
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