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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=us-ascii">
<title> Postfix manual - smtp-sink(1) </title>
</head> <body> <pre>
SMTP-SINK(1)                                                      SMTP-SINK(1)

<b>NAME</b>
       smtp-sink - multi-threaded 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>-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>-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  (backslace),  \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 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> <b>([</b><i>addr</i><b>])</b>
                     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="http://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

                                                                  SMTP-SINK(1)
</pre> </body> </html>