game/_incl_data/class/Core/Mail.php

<?php

namespace Core;

use PHPMailer;

class Mail
{
    public static function send($to, $message, $subject = 'Бойцовский клуб')
    {
        require dirname(__DIR__) . '/mail/class.phpmailer.php';
        $message = mb_convert_encoding($message, 'UTF-8', 'CP1251');
        $subject = mb_convert_encoding($subject, 'UTF-8', 'CP1251');
        $mail = new PHPMailer;

        $mail->IsSMTP();                                      // Set mailer to use SMTP
        $mail->Host = 'smtp.mail.yahoo.com';  // Specify main and backup server
        $mail->SMTPAuth = true;                               // Enable SMTP authentication
        $mail->Username = 'newcombats@yahoo.com';                            // SMTP username
        $mail->Password = 'uqcdbnsoagxcyysh';
        $mail->SMTPSecure = 'tls';                            // Enable encryption, 'ssl' also accepted
        $mail->Port = 587;
        $mail->CharSet = 'UTF-8';

        $mail->From = 'newcombats@yahoo.com';
        $mail->FromName = mb_convert_encoding('Бойцовский Клуб', 'UTF-8', 'CP1251');
        $mail->AddAddress($to);  // Add a recipient

        $mail->IsHTML(true);                                  // Set email format to HTML

        $mail->Subject = $subject;
        $mail->Body = '<div>' . $message . '</div>';
        $mail->AltBody = $message;

        if (!$mail->Send()) {
            return 'Message could not be sent. Mailer Error: ' . $mail->ErrorInfo;
        }
        return 1;
    }
}