class smtp

{

 /* Public Variables */

 public $smtp_port;

 public $time_out;

 public $host_name;

 public $log_file;

 public $relay_host;

 public $debug;

 public $auth;

 public $user;

 public $pass;



 /* Private Variables */

 private $sock;



 /* Constractor */

 function smtp($relay_host = "", $smtp_port = 25, $auth = false, $user, $pass)

 {

  $this->debug = FALSE;

  $this->smtp_port = $smtp_port;

  $this->relay_host = $relay_host;

  $this->time_out = 30; //is used in fsockopen()

  #

  $this->auth = $auth;//auth

  $this->user = $user;

  $this->pass = $pass;

  #

  $this->host_name = "localhost"; //is used in HELO command

  $this->log_file = "";



  $this->sock = FALSE;

 }



 /* Main Function */

 function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "")

 {

  $mail_from = $this->get_address($this->strip_comment($from));

  $body = preg_replace("/(^|(\r\n))(\\.)/", "\\1.\\3", $body);

  $header = "MIME-Version:1.0\r\n";

  if ($mailtype == "HTML") {

   $header .= "Content-Type:text/html\r\n";

  }

  $header .= "To: " . $to . "\r\n";

  if ($cc != "") {

   $header .= "Cc: " . $cc . "\r\n";

  }

  $header .= "From: $from<" . $from . ">\r\n";

  $header .= "Subject: " . $subject . "\r\n";

  $header .= $additional_headers;

  $header .= "Date: " . date("r") . "\r\n";

  $header .= "X-Mailer:By Redhat (PHP/" . phpversion() . ")\r\n";

  list($msec, $sec) = explode(" ", microtime());

  $header .= "Message-ID: <" . date("YmdHis", $sec) . "." . ($msec * 1000000) . "." . $mail_from . ">\r\n";

  $TO = explode(",", $this->strip_comment($to));



  if ($cc != "") {

   $TO = array_merge($TO, explode(",", $this->strip_comment($cc)));

  }



  if ($bcc != "") {

   $TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));

  }



  $sent = TRUE;

  foreach ($TO as $rcpt_to) {

   $rcpt_to = $this->get_address($rcpt_to);

   if (!$this->smtp_sockopen($rcpt_to)) {

    $this->log_write("Error: Cannot send email to " . $rcpt_to . "\n");

    $sent = FALSE;

    continue;

   }

   if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {

    $this->log_write("E-mail has been sent to <" . $rcpt_to . ">\n");

   } else {

    $this->log_write("Error: Cannot send email to <" . $rcpt_to . ">\n");

    $sent = FALSE;

   }

   fclose($this->sock);

   $this->log_write("Disconnected from remote host\n");

  }

  echo "
";

  echo $header;

  return $sent;

 }



 /* Private Functions */



 function smtp_send($helo, $from, $to, $header, $body = "")

 {

  if (!$this->smtp_putcmd("HELO", $helo)) {

   return $this->smtp_error("sending HELO command");

  }

  #auth

  if ($this->auth) {

   if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {

    return $this->smtp_error("sending HELO command");

   }

   if (!$this->smtp_putcmd("", base64_encode($this->pass))) {

    return $this->smtp_error("sending HELO command");

   }

  }

  #

  if (!$this->smtp_putcmd("MAIL", "FROM:<" . $from . ">")) {

   return $this->smtp_error("sending MAIL FROM command");

  }



  if (!$this->smtp_putcmd("RCPT", "TO:<" . $to . ">")) {

   return $this->smtp_error("sending RCPT TO command");

  }



  if (!$this->smtp_putcmd("DATA")) {

   return $this->smtp_error("sending DATA command");

  }



  if (!$this->smtp_message($header, $body)) {

   return $this->smtp_error("sending message");

  }



  if (!$this->smtp_eom()) {

   return $this->smtp_error("sending . [EOM]");

  }



  if (!$this->smtp_putcmd("QUIT")) {

   return $this->smtp_error("sending QUIT command");

  }



  return TRUE;

 }



 function smtp_sockopen($address)

 {

  if ($this->relay_host == "") {

   return $this->smtp_sockopen_mx($address);

  } else {

   return $this->smtp_sockopen_relay();

  }

 }



 function smtp_sockopen_relay()

 {

  $this->log_write("Trying to " . $this->relay_host . ":" . $this->smtp_port . "\n");

  $this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);

  if (!($this->sock && $this->smtp_ok())) {

   $this->log_write("Error: Cannot connenct to relay host " . $this->relay_host . "\n");

   $this->log_write("Error: " . $errstr . " (" . $errno . ")\n");

   return FALSE;

  }

  $this->log_write("Connected to relay host " . $this->relay_host . "\n");

  return TRUE;

 }



 function smtp_sockopen_mx($address)

 {

  $domain = preg_replace("/^.+@([^@]+)$/", "\\1", $address);

  if (!@getmxrr($domain, $MXHOSTS)) {

   $this->log_write("Error: Cannot resolve MX "" . $domain . ""\n");

   return FALSE;

  }

  foreach ($MXHOSTS as $host) {

   $this->log_write("Trying to " . $host . ":" . $this->smtp_port . "\n");

   $this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);

   if (!($this->sock && $this->smtp_ok())) {

    $this->log_write("Warning: Cannot connect to mx host " . $host . "\n");

    $this->log_write("Error: " . $errstr . " (" . $errno . ")\n");

    continue;

   }

   $this->log_write("Connected to mx host " . $host . "\n");

   return TRUE;

  }

  $this->log_write("Error: Cannot connect to any mx hosts (" . implode(", ", $MXHOSTS) . ")\n");

  return FALSE;

 }



 function smtp_message($header, $body)

 {

  fputs($this->sock, $header . "\r\n" . $body);

  $this->smtp_debug("> " . str_replace("\r\n", "\n" . "> ", $header . "\n> " . $body . "\n> "));



  return TRUE;

 }



 function smtp_eom()

 {

  fputs($this->sock, "\r\n.\r\n");

  $this->smtp_debug(". [EOM]\n");



  return $this->smtp_ok();

 }



 function smtp_ok()

 {

  $respOnse= str_replace("\r\n", "", fgets($this->sock, 512));

  $this->smtp_debug($response . "\n");



  if (!preg_match("/^[23]/", $response)) {

   fputs($this->sock, "QUIT\r\n");

   fgets($this->sock, 512);

   $this->log_write("Error: Remote host returned "" . $response . ""\n");

   return FALSE;

  }

  return TRUE;

 }



 function smtp_putcmd($cmd, $arg = "")

 {

  if ($arg != "") {

   if ($cmd == "") $cmd = $arg;

   else $cmd = $cmd . " " . $arg;

  }



  fputs($this->sock, $cmd . "\r\n");

  $this->smtp_debug("> " . $cmd . "\n");



  return $this->smtp_ok();

 }



 function smtp_error($string)

 {

  $this->log_write("Error: Error occurred while " . $string . ".\n");

  return FALSE;

 }



 function log_write($message)

 {

  $this->smtp_debug($message);



  if ($this->log_file == "") {

   return TRUE;

  }



  $message = date("M d H:i:s ") . get_current_user() . "[" . getmypid() . "]: " . $message;

  if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a"))) {

   $this->smtp_debug("Warning: Cannot open log file "" . $this->log_file . ""\n");

   return FALSE;

  }

  flock($fp, LOCK_EX);

  fputs($fp, $message);

  fclose($fp);



  return TRUE;

 }



 function strip_comment($address)

 {

  $comment = "/\\([^()]*\\)/";

  while (preg_match($comment, $address)) {

   $address = preg_replace($comment, "", $address);

  }



  return $address;

 }



 function get_address($address)

 {

  $address = preg_replace("/([ \t\r\n])+/", "", $address);

  $address = preg_replace("/^.*<(.+)>.*$/", "\\1", $address);



  return $address;

 }



 function smtp_debug($message)

 {

  if ($this->debug) {

   echo $message . "
";

  }

 }



 function get_attach_type($image_tag)

 { //



  $filedata = array();



  $img_file_con = fopen($image_tag, "r");

  unset($image_data);

  while ($tem_buffer = AddSlashes(fread($img_file_con, filesize($image_tag))))

   $image_data = $tem_buffer;

  fclose($img_file_con);



  $filedata['context'] = $image_data;

  $filedata['filename'] = basename($image_tag);

  $extension = substr($image_tag, strrpos($image_tag, "."), strlen($image_tag) - strrpos($image_tag, "."));

  switch ($extension) {

   case ".gif":

    $filedata['type'] = "image/gif";

    break;

   case ".gz":

    $filedata['type'] = "application/x-gzip";

    break;

   case ".htm":

    $filedata['type'] = "text/html";

    break;

   case ".html":

    $filedata['type'] = "text/html";

    break;

   case ".jpg":

    $filedata['type'] = "image/jpeg";

    break;

   case ".tar":

    $filedata['type'] = "application/x-tar";

    break;

   case ".txt":

    $filedata['type'] = "text/plain";

    break;

   case ".zip":

    $filedata['type'] = "application/zip";

    break;

   default:

    $filedata['type'] = "application/octet-stream";

    break;

  }

  return $filedata;

 }



} // end cla



$smtpserver = "smtp.163.com";//SMTP服务器

$smtpserverport = 25;//SMTP服务器端口

$smtpusermail = "xxx163.com";//SMTP服务器的用户邮箱

$smtpemailto = "xxx@qq.com";//发送给谁

$smtpuser = "xxx@163.com";//SMTP服务器的用户帐号

$smtppass = "xxx";//SMTP服务器的用户密码

$mailsubject = "PHP测试邮件系统";//邮件主题

$mailbody = "

这是一个测试程序

";//邮件内容

$mailtype = "HTML";//邮件格式（HTML/TXT）,TXT为文本邮件

##########################################

$smtp = new smtp($smtpserver, $smtpserverport, true, $smtpuser, $smtppass);//这里面的一个true是表示使用身份验证,否则不使用身份验证.

$smtp->debug = true;//是否显示发送的调试信息

$smtp->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype);