class.smtp.php

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        if(!$pos) {
          $pos = $max_line_length - 1;
        }

        $lines_out[] = substr($line,0,$pos);
        $line = substr($line,$pos + 1);
        # if we are processing headers we need to
        # add a LWSP-char to the front of the new line
        # rfc 822 on long msg headers
        if($in_headers) {
          $line = "\t" . $line;
        }
      }
      $lines_out[] = $line;

      # now send the lines to the server
      while(list(,$line_out) = @each($lines_out)) {
        if(strlen($line_out) > 0)
        {
          if(substr($line_out, 0, 1) == ".") {
            $line_out = "." . $line_out;
          }
        }
        fputs($this->smtp_conn,$line_out . $this->CRLF);
      }
    }

    # ok all the message data has been sent so lets get this
    # over with aleady
    fputs($this->smtp_conn, $this->CRLF . "." . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
      array("error" => "DATA not accepted from server",
      "smtp_code" => $code,
      "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
        ": " . $rply . $this->CRLF;
      }
      return false;
    }
    return true;
  }

  /**
     * Expand takes the name and asks the server to list all the
     * people who are members of the _list_. Expand will return
     * back and array of the result or false if an error occurs.
     * Each value in the array returned has the format of:
     *     [ <full-name> <sp> ] <path>
     * The definition of <path> is defined in rfc 821
     *
     * Implements rfc 821: EXPN <SP> <string> <CRLF>
     *
     * SMTP CODE SUCCESS: 250
     * SMTP CODE FAILURE: 550
     * SMTP CODE ERROR  : 500,501,502,504,421
     * @access public
     * @return string array
     */
  function Expand($name) {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
      "error" => "Called Expand() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"EXPN " . $name . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
      array("error" => "EXPN not accepted from server",
      "smtp_code" => $code,
      "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
        ": " . $rply . $this->CRLF;
      }
      return false;
    }

    # parse the reply and place in our array to return to user
    $entries = explode($this->CRLF,$rply);
    while(list(,$l) = @each($entries)) {
      $list[] = substr($l,4);
    }

    return $list;
  }

  /**
     * Sends the HELO command to the smtp server.
     * This makes sure that we and the server are in
     * the same known state.
     *
     * Implements from rfc 821: HELO <SP> <domain> <CRLF>
     *
     * SMTP CODE SUCCESS: 250
     * SMTP CODE ERROR  : 500, 501, 504, 421
     * @access public
     * @return bool
     */
  function Hello($host="") {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
      "error" => "Called Hello() without being connected");
      return false;
    }

    # if a hostname for the HELO wasn't specified determine
    # a suitable one to send
    if(empty($host)) {
      # we need to determine some sort of appopiate default
      # to send to the server
      $host = "localhost";
    }

    // Send extended hello first (RFC 2821)
    if(!$this->SendHello("EHLO", $host))
    {
      if(!$this->SendHello("HELO", $host))
      return false;
    }

    return true;
  }

  /**
     * Sends a HELO/EHLO command.
     * @access private
     * @return bool
     */
  function SendHello($hello, $host) {
    fputs($this->smtp_conn, $hello . " " . $host . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER: " . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
      array("error" => $hello . " not accepted from server",
      "smtp_code" => $code,
      "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
        ": " . $rply . $this->CRLF;
      }
      return false;
    }

    $this->helo_rply = $rply;

    return true;
  }

  /**
     * Gets help information on the keyword specified. If the keyword
     * is not specified then returns generic help, ussually contianing
     * A list of keywords that help is available on. This function
     * returns the results back to the user. It is up to the user to
     * handle the returned data. If an error occurs then false is
     * returned with $this->error set appropiately.
     *
     * Implements rfc 821: HELP [ <SP> <string> ] <CRLF>
     *
     * SMTP CODE SUCCESS: 211,214
     * SMTP CODE ERROR  : 500,501,502,504,421
     * @access public
     * @return string
     */
  function Help($keyword="") {
    $this->error = null; # to avoid confusion

    if(!$this->connected()) {
      $this->error = array(
      "error" => "Called Help() without being connected");
      return false;
    }

    $extra = "";
    if(!empty($keyword)) {
      $extra = " " . $keyword;
    }

    fputs($this->smtp_conn,"HELP" . $extra . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 211 && $code != 214) {
      $this->error =
      array("error" => "HELP not accepted from server",
      "smtp_code" => $code,
      "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
        ": " . $rply . $this->CRLF;
      }
      return false;
    }

    return $rply;
  }

  /**
     * Starts a mail transaction from the email address specified in
     * $from. Returns true if successful or false otherwise. If True
     * the mail transaction is started and then one or more Recipient
     * commands may be called followed by a Data command.
     *
     * Implements rfc 821: MAIL <SP> FROM:<reverse-path> <CRLF>
     *
     * SMTP CODE SUCCESS: 250
     * SMTP CODE SUCCESS: 552,451,452
     * SMTP CODE SUCCESS: 500,501,421
     * @access public
     * @return bool
     */
  function Mail($from) {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
      "error" => "Called Mail() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"MAIL FROM:<" . $from . ">" . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
      array("error" => "MAIL not accepted from server",
      "smtp_code" => $code,
      "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
        ": " . $rply . $this->CRLF;
      }
      return false;
    }
    return true;
  }

  /**
     * Sends the command NOOP to the SMTP server.
     *
     * Implements from rfc 821: NOOP <CRLF>
     *
     * SMTP CODE SUCCESS: 250
     * SMTP CODE ERROR  : 500, 421
     * @access public
     * @return bool
     */
  function Noop() {
    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {
      $this->error = array(
      "error" => "Called Noop() without being connected");
      return false;
    }

    fputs($this->smtp_conn,"NOOP" . $this->CRLF);

    $rply = $this->get_lines();
    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $rply;
    }

    if($code != 250) {
      $this->error =
      array("error" => "NOOP not accepted from server",
      "smtp_code" => $code,
      "smtp_msg" => substr($rply,4));
      if($this->do_debug >= 1) {
        echo "SMTP -> ERROR: " . $this->error["error"] .
        ": " . $rply . $this->CRLF;
      }
      return false;
    }
    return true;
  }

  /**
     * Sends the quit command to the server and then closes the socket
     * if there is no error or the $close_on_error argument is true.
     *
     * Implements from rfc 821: QUIT <CRLF>
     *
     * SMTP CODE SUCCESS: 221
     * SMTP CODE ERROR  : 500
     * @access public
     * @return bool
     */
  function Quit($close_on_error=true) {
    $this->error = null; # so there is no confusion

    if(!$this->connected()) {
      $this->error = array(
      "error" => "Called Quit() without being connected");
      return false;
    }

    # send the quit command to the server
    fputs($this->smtp_conn,"quit" . $this->CRLF);

    # get any good-bye messages
    $byemsg = $this->get_lines();

    if($this->do_debug >= 2) {
      echo "SMTP -> FROM SERVER:" . $this->CRLF . $byemsg;
    }

    $rval = true;
    $e = null;

    $code = substr($byemsg,0,3);
    if($code != 221) {
      # use e as a tmp var cause Close will overwrite $this->error
      $e = array("error" => "SMTP server rejected quit command",