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";

        }

        $header .= "From: 报名邮件.<".$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";

        $utfheader=iconv("UTF-8","GB2312",$header);

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

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

    }

include("sendmail.php");//发送邮件类

        ####################--发邮件--####################

        $smtpserver     =     "smtp.126.com";//SMTP服务器

        $smtpserverport =    25;//SMTP服务器端口

        $smtpusermail     =     "test@126.com";//SMTP服务器的用户邮箱

        $smtpuser         =     "test";//SMTP服务器的用户帐号

        $smtppass         =     "123456";//SMTP服务器的用户密码

        $smtpemailto     =     "dianzhong@126.com";//发送给谁

        $mailsubject     =     $username.'报名!';//邮件主题

        $mailtime        =    date("Y-m-d H:i:s");

        $mailbody         =     $content;//邮件内容

        $utfmailbody    =    iconv("UTF-8","GB2312",$mailbody);//转换邮件编码

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