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("(^|(\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");
        }
        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."\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)
        {
                $domain = ereg_replace("^.+@([^@]+)$", "\\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 (!ereg("^[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)
        {
                $comment = "\\([^()]*\\)";
                while (ereg($comment, $address)) {
                        $address = ereg_replace($comment, "", $address);
                }
                
                return $address;
        }

        function get_address($address)
        {
                $address = ereg_replace("([ \t\r\n])+", "", $address);
                $address = ereg_replace("^.*<(.+)>;.*$", "\\1", $address);
                
                return $address;
        }
        
        function smtp_debug($message)
        {
                if ($this->debug) {
                        echo $message;
                }
        }
}

function sendmail($smtpserver,$smtpuser,$smtppass,$smtpemailto,$smtpusermail, $mailsubject, $mailbody){
        $smtp = new smtp($smtpserver,25,true,$smtpuser,$smtppass);
        //$smtp->debug = TRUE;
        $smtp->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, "HTML");        
}