1. Mở file \libraries\SEmail.php thêm hàm mới như sau:

    function send_smtp($address_to, $subject, $htmlcontent, $plaincontent = "", $attachment = array()) {
        global $admin_name, $admin_email;
        $PHPMailer = new PHPMailer;

        $PHPMailer->IsSMTP(); // telling the class to use SMTP
        $PHPMailer->SMTPDebug = 0;                      // enables SMTP debug information (for testing)
        // 1 = errors and messages
        // 2 = messages only
        $PHPMailer->SMTPAuth = true;                  // enable SMTP authentication
        //$PHPMailer->SMTPSecure = 'ssl'; // secure transfer enabled REQUIRED for GMail
        $PHPMailer->Host = "smtp.domain.com"; // sets the SMTP server
        //$PHPMailer->Port       = 465;                    // set the SMTP port for the GMAIL server
        $PHPMailer->Username = "email address"; // SMTP account username
        $PHPMailer->Password = "password";        // SMTP account password

        $PHPMailer->From = $admin_email;
        $PHPMailer->FromName = $admin_name;
        $PHPMailer->ClearAllRecipients();
        $PHPMailer->AddAddress($address_to);
        $PHPMailer->Subject = $subject;
        $PHPMailer->Body = $htmlcontent;
        $PHPMailer->AltBody = $plaincontent;
        $PHPMailer->IsHTML(true);
        while (list($k, $v) = each($attachment)) {
            $PHPMailer->AddAttachment($v['file'], $v['nickname']);
        }
        $status = @$PHPMailer->Send();
        $PHPMailer->ClearAddresses();
        $PHPMailer->ClearAttachments();
        return $status;
    }


2. Mở file \include\functions\main.php
Tìm function mailme và comment hàm này lại thay bằng hàm mới như sau:
function mailme($sendto, $sendername, $from, $subject, $sendmailbody, $bcc = "") {
    $subject = nl2br($subject);
    $sendmailbody = nl2br($sendmailbody);
    SEmail::send_smtp($sendto, $subject, $sendmailbody);
}