>state,"Connected"))
  {
   $this->error="connection is not in the initial state";
   return(0);
  }
  $this->error="";
  if(!$this->PutLine("MAIL FROM: <".$sender.">"))
   return(0);
  if(!IsSet($this->esmtp_extensions["PIPELINING"])
  && $this->VerifyResultLines("250")<=0)
   return(0);
  $this->state="SenderSet";
  if(IsSet($this->esmtp_extensions["PIPELINING"]))
   $this->pending_sender=1;
  $this->pending_recipients=0;
  return(1);
}

Function SetRecipient($recipient)
{
  switch($this->state)
  {
   case "SenderSet":
   case "RecipientSet":
    break;
   default:
    $this->error="connection is not in the recipient setting state";
    return(0);
  }
  $this->error="";
  if(!$this->PutLine("RCPT TO:&lt;".$recipient."&gt;"))
   return(0);
  if(IsSet($this->esmtp_extensions["PIPELINING"]))
  {
   $this->pending_recipients++;
   if($this->pending_recipients>=$this->maximum_piped_recipients)
   {
    if(!$this->FlushRecipients())
     return(0);
   }
  }
  else
  {
   if($this->VerifyResultLines(array("250","251"))<=0)
    return(0);
  }
  $this->state="RecipientSet";
  return(1);
}

Function StartData()
{
  if(strcmp($this->state,"RecipientSet"))
  {
   $this->error="connection is not in the start sending data state";
   return(0);
  }
  $this->error="";
  if(!$this->PutLine("DATA"))
   return(0);
  if($this->pending_recipients)
  {
   if(!$this->FlushRecipients())
    return(0);
  }
  if($this->VerifyResultLines("354")<=0)
   return(0);
  $this->state="SendingData";
  return(1);
}

Function PrepareData($data,&$output)
{
  $length=strlen(&$data);
  for($output="",$position=0;$position<$length;)
  {
   $next_position=$length;
   for($current=$position;$current<$length;$current++)
   {
    switch($data[$current])
    {
     case " ":
      $next_position=$current+1;
      break 2;
     case " ":
      $next_position=$current+1;
      if($data[$next_position]==" ")
       $next_position++;
      break 2;
    }
   }
   if($data[$position]==".")
    $output.=".";
   $output.=substr(&$data,$position,$current-$position)." ";
   $position=$next_position;
  }
}

Function SendData($data)
{
  if(strcmp($this->state,"SendingData"))
  {
   $this->error="connection is not in the sending data state";
   return(0);
  }
  $this->error="";
  return($this->PutData(&$data));
}

Function EndSendingData()
{
  if(strcmp($this->state,"SendingData"))
  {
   $this->error="connection is not in the sending data state";
   return(0);
  }
  $this->error="";
  if(!$this->PutLine(" .")
  || $this->VerifyResultLines("250")<=0)
   return(0);
  $this->state="Connected";
  return(1);
}

Function ResetConnection()
{
  switch($this->state)
  {
   case "Connected":
    return(1);
   case "SendingData":
    $this->error="can not reset the connection while sending data";
    return(0);
   case "Disconnected":
    $this->error="can not reset the connection before it is established";
    return(0);
  }
  $this->error="";
  if(!$this->PutLine("RSET")
  || $this->VerifyResultLines("250")<=0)
   return(0);
  $this->state="Connected";
  return(1);
}

Function Disconnect($quit=1)
{
  if(!strcmp($this->state,"Disconnected"))
  {
   $this->error="it was not previously established a SMTP connection";
   return(0);
  }
  $this->error="";
  if(!strcmp($this->state,"Connected")
  && $quit
  && (!$this->PutLine("QUIT")
  || $this->VerifyResultLines("221")<=0))
   return(0);
  fclose($this->connection);
  $this->connection=0;
  $this->state="Disconnected";
  return(1);
}

Function SendMessage($sender,$recipients,$headers,$body)
{
  if(($success=$this->Connect()))
  {
   if(($success=$this->MailFrom($sender)))
   {
    for($recipient=0;$recipient<count($recipients);$recipient++)
    {
     if(!($success=$this->SetRecipient($recipients[$recipient])))
      break;
    }
    if($success
    && ($success=$this->StartData()))
    {
     for($header_data="",$header=0;$header<count($headers);$header++)
      $header_data.=$headers[$header]." ";
     if(($success=$this->SendData($header_data." ")))
     {
      $this->PrepareData($body,&$body_data);
      $success=$this->SendData($body_data);
     }
     if($success)
      $success=$this->EndSendingData();
    }
   }
   $disconnect_success=$this->Disconnect($success);
   if($success)
    $success=$disconnect_success;
  }
  return($success);
}

};

?>

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