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+<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN"
+ "http://www.w3.org/TR/html4/loose.dtd">
+<html> <head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title> Postfix manual - smtp-sink(1) </title>
+</head> <body> <pre>
+SMTP-SINK(1) SMTP-SINK(1)
+
+<b>NAME</b>
+ smtp-sink - parallelized SMTP/LMTP test server
+
+<b>SYNOPSIS</b>
+ <b>smtp-sink</b> [<i>options</i>] [<b>inet:</b>][<i>host</i>]:<i>port backlog</i>
+
+ <b>smtp-sink</b> [<i>options</i>] <b>unix:</b><i>pathname backlog</i>
+
+<b>DESCRIPTION</b>
+ <b>smtp-sink</b> listens on the named host (or address) and port. It takes
+ SMTP messages from the network and throws them away. The purpose is to
+ measure client performance, not protocol compliance.
+
+ <b>smtp-sink</b> may also be configured to capture each mail delivery transac-
+ tion to file. Since disk latencies are large compared to network
+ delays, this mode of operation can reduce the maximal performance by
+ several orders of magnitude.
+
+ Connections can be accepted on IPv4 or IPv6 endpoints, or on
+ UNIX-domain sockets. IPv4 and IPv6 are the default. This program is
+ the complement of the <a href="smtp-source.1.html"><b>smtp-source</b>(1)</a> program.
+
+ Note: this is an unsupported test program. No attempt is made to main-
+ tain compatibility between successive versions.
+
+ Arguments:
+
+ <b>-4</b> Support IPv4 only. This option has no effect when Postfix is
+ built without IPv6 support.
+
+ <b>-6</b> Support IPv6 only. This option is not available when Postfix is
+ built without IPv6 support.
+
+ <b>-8</b> Do not announce 8BITMIME support.
+
+ <b>-a</b> Do not announce SASL authentication support.
+
+ <b>-A</b> <i>delay</i>
+ Wait <i>delay</i> seconds after responding to DATA, then abort prema-
+ turely with a 550 reply status. Do not read further input from
+ the client; this is an attempt to block the client before it
+ sends ".". Specify a zero delay value to abort immediately.
+
+ <b>-b</b> <i>soft-bounce-reply</i>
+ Use <i>soft-bounce-reply</i> for soft reject responses. The default
+ reply is "450 4.3.0 Error: command failed".
+
+ <b>-B</b> <i>hard-bounce-reply</i>
+ Use <i>hard-bounce-reply</i> for hard reject responses. The default
+ reply is "500 5.3.0 Error: command failed".
+
+ <b>-c</b> Display running counters that are updated whenever an SMTP ses-
+ sion ends, a QUIT command is executed, or when "." is received.
+
+ <b>-C</b> Disable XCLIENT support.
+
+ <b>-d</b> <i>dump-template</i>
+ Dump each mail transaction to a single-message file whose name
+ is created by expanding the <i>dump-template</i> via strftime(3) and
+ appending a pseudo-random hexadecimal number (example:
+ "%Y%m%d%H/%M." expands into "2006081203/05.809a62e3"). If the
+ template contains "/" characters, missing directories are cre-
+ ated automatically. The message dump format is described below.
+
+ Note: this option keeps one capture file open for every mail
+ transaction in progress.
+
+ <b>-D</b> <i>dump-template</i>
+ Append mail transactions to a multi-message dump file whose name
+ is created by expanding the <i>dump-template</i> via strftime(3). If
+ the template contains "/" characters, missing directories are
+ created automatically. The message dump format is described
+ below.
+
+ Note: this option keeps one capture file open for every mail
+ transaction in progress.
+
+ <b>-e</b> Do not announce ESMTP support.
+
+ <b>-E</b> Do not announce ENHANCEDSTATUSCODES support.
+
+ <b>-f</b> <i>command,command,...</i>
+ Reject the specified commands with a hard (5xx) error code.
+ This option implies <b>-p</b>.
+
+ Examples of commands are CONNECT, HELO, EHLO, LHLO, MAIL, RCPT,
+ VRFY, DATA, ., RSET, NOOP, and QUIT. Separate command names by
+ white space or commas, and use quotes to protect white space
+ from the shell. Command names are case-insensitive.
+
+ <b>-F</b> Disable XFORWARD support.
+
+ <b>-h</b> <i>hostname</i>
+ Use <i>hostname</i> in the SMTP greeting, in the HELO response, and in
+ the EHLO response. The default hostname is "smtp-sink".
+
+ <b>-H</b> <i>delay</i>
+ Delay the first read operation after receiving DATA (time in
+ seconds). Combine with a large test message and a small TCP win-
+ dow size (see the <b>-T</b> option) to test the Postfix client
+ write_wait() implementation.
+
+ <b>-L</b> Enable LMTP instead of SMTP.
+
+ <b>-m</b> <i>count</i> (default: 256)
+ An upper bound on the maximal number of simultaneous connections
+ that <b>smtp-sink</b> will handle. This prevents the process from run-
+ ning out of file descriptors. Excess connections will stay
+ queued in the TCP/IP stack.
+
+ <b>-M</b> <i>count</i>
+ Terminate after receiving <i>count</i> messages.
+
+ <b>-n</b> <i>count</i>
+ Terminate after <i>count</i> sessions.
+
+ <b>-N</b> Do not announce support for DSN.
+
+ <b>-p</b> Do not announce support for ESMTP command pipelining.
+
+ <b>-P</b> Change the server greeting so that it appears to come through a
+ CISCO PIX system. Implies <b>-e</b>.
+
+ <b>-q</b> <i>command,command,...</i>
+ Disconnect (without replying) after receiving one of the speci-
+ fied commands.
+
+ Examples of commands are CONNECT, HELO, EHLO, LHLO, MAIL, RCPT,
+ VRFY, DATA, ., RSET, NOOP, and QUIT. Separate command names by
+ white space or commas, and use quotes to protect white space
+ from the shell. Command names are case-insensitive.
+
+ <b>-Q</b> <i>command,command,...</i>
+ Send a 421 reply and disconnect after receiving one of the spec-
+ ified commands.
+
+ Examples of commands are CONNECT, HELO, EHLO, LHLO, MAIL, RCPT,
+ VRFY, DATA, ., RSET, NOOP, and QUIT. Separate command names by
+ white space or commas, and use quotes to protect white space
+ from the shell. Command names are case-insensitive.
+
+ <b>-r</b> <i>command,command,...</i>
+ Reject the specified commands with a soft (4xx) error code.
+ This option implies <b>-p</b>.
+
+ Examples of commands are CONNECT, HELO, EHLO, LHLO, MAIL, RCPT,
+ VRFY, DATA, ., RSET, NOOP, and QUIT. Separate command names by
+ white space or commas, and use quotes to protect white space
+ from the shell. Command names are case-insensitive.
+
+ <b>-R</b> <i>root-directory</i>
+ Change the process root directory to the specified location.
+ This option requires super-user privileges. See also the <b>-u</b>
+ option.
+
+ <b>-s</b> <i>command,command,...</i>
+ Log the named commands to syslogd.
+
+ Examples of commands are CONNECT, HELO, EHLO, LHLO, MAIL, RCPT,
+ VRFY, DATA, ., RSET, NOOP, and QUIT. Separate command names by
+ white space or commas, and use quotes to protect white space
+ from the shell. Command names are case-insensitive.
+
+ <b>-S start-string</b>
+ An optional string that is prepended to each message that is
+ written to a dump file (see the dump file format description
+ below). The following C escape sequences are supported: \a
+ (bell), \b (backspace), \f (formfeed), \n (newline), \r (car-
+ riage return), \t (horizontal tab), \v (vertical tab), \<i>ddd</i> (up
+ to three octal digits) and \\ (the backslash character).
+
+ <b>-t</b> <i>timeout</i> (default: 100)
+ Limit the time for receiving a command or sending a response.
+ The time limit is specified in seconds.
+
+ <b>-T</b> <i>windowsize</i>
+ Override the default TCP window size. To work around broken TCP
+ window scaling implementations, specify a value &gt; 0 and &lt; 65536.
+
+ <b>-u</b> <i>username</i>
+ Switch to the specified user privileges after opening the net-
+ work socket and optionally changing the process root directory.
+ This option is required when the process runs with super-user
+ privileges. See also the <b>-R</b> option.
+
+ <b>-v</b> Show the SMTP conversations.
+
+ <b>-w</b> <i>delay</i>
+ Wait <i>delay</i> seconds before responding to a DATA command.
+
+ <b>-W</b> <i>command:delay[:odds]</i>
+ Wait <i>delay</i> seconds before responding to <i>command</i>. If <i>odds</i> is
+ also specified (a number between 1-99 inclusive), wait for a
+ random multiple of <i>delay</i>. The random multiplier is equal to the
+ number of times the program needs to roll a dice with a range of
+ 0..99 inclusive, before the dice produces a result greater than
+ or equal to <i>odds</i>.
+
+ [<b>inet:</b>][<i>host</i>]:<i>port</i>
+ Listen on network interface <i>host</i> (default: any interface) TCP
+ port <i>port</i>. Both <i>host</i> and <i>port</i> may be specified in numeric or
+ symbolic form.
+
+ <b>unix:</b><i>pathname</i>
+ Listen on the UNIX-domain socket at <i>pathname</i>.
+
+ <i>backlog</i>
+ The maximum length of the queue of pending connections, as
+ defined by the <b>listen</b>(2) system call.
+
+<b>DUMP FILE FORMAT</b>
+ Each dumped message contains a sequence of text lines, terminated with
+ the newline character. The sequence of information is as follows:
+
+ <b>o</b> The optional string specified with the <b>-S</b> option.
+
+ <b>o</b> The <b>smtp-sink</b> generated headers as documented below.
+
+ <b>o</b> The message header and body as received from the SMTP client.
+
+ <b>o</b> An empty line.
+
+ The format of the <b>smtp-sink</b> generated headers is as follows:
+
+ <b>X-Client-Addr:</b> <i>text</i>
+ The client IP address without enclosing []. An IPv6 address is
+ prefixed with "ipv6:". This record is always present.
+
+ <b>X-Client-Proto:</b> <i>text</i>
+ The client protocol: SMTP, ESMTP or LMTP. This record is always
+ present.
+
+ <b>X-Helo-Args:</b> <i>text</i>
+ The arguments of the last HELO or EHLO command before this mail
+ delivery transaction. This record is present only if the client
+ sent a recognizable HELO or EHLO command before the DATA com-
+ mand.
+
+ <b>X-Mail-Args:</b> <i>text</i>
+ The arguments of the MAIL command that started this mail deliv-
+ ery transaction. This record is present exactly once.
+
+ <b>X-Rcpt-Args:</b> <i>text</i>
+ The arguments of an RCPT command within this mail delivery
+ transaction. There is one record for each RCPT command, and they
+ are in the order as sent by the client.
+
+ <b>Received:</b> <i>text</i>
+ A message header for compatibility with mail processing soft-
+ ware. This three-line header marks the end of the headers pro-
+ vided by <b>smtp-sink</b>, and is formatted as follows:
+
+ <b>from</b> <i>helo</i> ([<i>addr</i>])
+ The HELO or EHLO command argument and client IP address.
+ If the client did not send HELO or EHLO, the client IP
+ address is used instead.
+
+ <b>by</b> <i>host</i> <b>(smtp-sink) with</b> <i>proto</i> <b>id</b> <i>random</i><b>;</b>
+ The hostname specified with the <b>-h</b> option, the client
+ protocol (see <b>X-Client-Proto</b> above), and the pseudo-ran-
+ dom portion of the per-message capture file name.
+
+ <i>time-stamp</i>
+ A time stamp as defined in <a href="https://tools.ietf.org/html/rfc2822">RFC 2822</a>.
+
+<b>SEE ALSO</b>
+ <a href="smtp-source.1.html">smtp-source(1)</a>, SMTP/LMTP message generator
+
+<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
+
+ Wietse Venema
+ Google, Inc.
+ 111 8th Avenue
+ New York, NY 10011, USA
+
+ SMTP-SINK(1)
+</pre> </body> </html>