PHP SendMail

<?php
class smtp {
    /* Public Variables */
    var $smtp_port;
    var $time_out;
    var $host_name;
    var $log_file;
    var $relay_host;
    var $debug;
    var $auth;
    var $user;
    var $pass;

    /* Private Variables */
    var $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 = ereg_replace("(^|( ))(.)", "1.3", $body);
        $header = "MIME-Version:1.0 ";

        if($mailtype=="HTML"){
            $header .= "Content-Type:text/html ";
        }

        $header .= "To: ".$to." ";

        if ($cc != "") {
            $header .= "Cc: ".$cc." ";
        }

        $header .= "From: $from<".$from."> ";
        $header .= "Subject: ".$subject." ";
        $header .= $additional_headers;
        $header .= "Date: ".date("r")." ";
        $header .= "X-Mailer:By Redhat (PHP/".phpversion().") ";

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

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

        $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." ");
                $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."> ");
            } else {
                $this->log_write("Error: Cannot send email to <".$rcpt_to."> ");
                $sent = FALSE;
            }

            fclose($this->sock);

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

        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 <CR><LF>.<CR><LF> [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." ");
        $this->sock = @fsockopen($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." ");
            $this->log_write("Error: ".$errstr." (".$errno.") ");
            return FALSE;
        }
        $this->log_write("Connected to relay host ".$this->relay_host." ");
        return TRUE;
    }

    function smtp_sockopen_mx($address) {

        $domain = ereg_replace("", "1", $address);

        if (, $MXHOSTS)) {

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

            return FALSE;
        }

        foreach ($MXHOSTS as $host) {

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

            $this->sock = @fsockopen($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." ");

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

                continue;

            }

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

            return TRUE;
        }

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

        return FALSE;
    }

    function smtp_message($header, $body) {

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

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

   return TRUE;

    }

    function smtp_eom() {

        fputs($this->sock, " . ");

        $this->smtp_debug(". [EOM] ");

        return $this->smtp_ok();

    }

    function smtp_ok() {
        $response = str_replace(" ", "", fgets($this->sock, 512));
        $this->smtp_debug($response." ");

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

            fputs($this->sock, "QUIT ");

            fgets($this->sock, 512);

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

            return FALSE;
        }
        return TRUE;
    }

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

        if ($arg != "") {

            if($cmd=="") $cmd = $arg;

            else $cmd = $cmd." ".$arg;

        }

        fputs($this->sock, $cmd." ");

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

        return $this->smtp_ok();

    }

    function smtp_error($string) {

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

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

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

            return FALSE;;

        }

        flock($fp, LOCK_EX);

        fputs($fp, $message);

        fclose($fp);

        return TRUE;

    }

    function strip_comment($address) {

        $comment = "([^()]*)";

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

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

        }

        return $address;

    }

    function get_address($address) {

        $address = ereg_replace("([ ])+", "", $address);

        $address = ereg_replace("^.*<(.+)>.*$", "1", $address);

        return $address;

    }

    function smtp_debug($message) {
        if ($this->debug) {
    echo $message;
        }
    }

}
?>

<?php

//*****************************************************************
// 方法 使用
//
//*****************************************************************

$smtpserver = "smtp.XXX.cn";//SMTP服务器

$smtpserverport =25;//SMTP服务器端口

$smtpusermail = "服务器的用户邮箱

$smtpemailto = "发送给谁

$smtpuser = "XXX";//SMTP服务器的用户帐号

$smtppass = "XXXX";//SMTP服务器的用户密码

$mailsubject = "Test Subject";//邮件主题

$mailbody = "<h1>This is a test mail</h1>";//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);

?>