via smtp yandex not all letters are sent

There are two fragments of the sending script almost through smtp Yandex .
The first:

<?php class SendMailSmtpClass { /** * * @var string $smtp_username - логин * @var string $smtp_password - пароль * @var string $smtp_host - хост * @var string $smtp_from - от кого * @var integer $smtp_port - порт * @var string $smtp_charset - кодировка * */ public $smtp_username; public $smtp_password; public $smtp_host; public $smtp_from; public $smtp_port; public $smtp_charset; public function __construct($smtp_username, $smtp_password, $smtp_host, $smtp_from, $smtp_port = 25, $smtp_charset = "utf-8") { $this->smtp_username = $smtp_username; $this->smtp_password = $smtp_password; $this->smtp_host = $smtp_host; $this->smtp_from = $smtp_from; $this->smtp_port = $smtp_port; $this->smtp_charset = $smtp_charset; } /** * Отправка письма * * @param string $mailTo - получатель письма * @param string $subject - тема письма * @param string $message - тело письма * @param string $headers - заголовки письма * * @return bool|string В случаи отправки вернет true, иначе текст ошибки * */ function send($mailTo, $subject, $message, $headers) { $contentMail = "Date: " . date("D, d MYH:i:s") . " UT\r\n"; $contentMail .= 'Subject: =?' . $this->smtp_charset . '?B?' . base64_encode($subject) . "=?=\r\n"; $contentMail .= $headers . "\r\n"; $contentMail .= $message . "\r\n"; try { if(!$socket = @fsockopen($this->smtp_host, $this->smtp_port, $errorNumber, $errorDescription, 30)){ throw new Exception($errorNumber.".".$errorDescription); } if (!$this->_parseServer($socket, "220")){ throw new Exception('Connection error'); } $server_name = $_SERVER["SERVER_NAME"]; fputs($socket, "HELO $server_name\r\n"); if (!$this->_parseServer($socket, "250")) { fclose($socket); throw new Exception('Error of command sending: HELO'); } fputs($socket, "AUTH LOGIN\r\n"); if (!$this->_parseServer($socket, "334")) { fclose($socket); throw new Exception('Autorization error'); } fputs($socket, base64_encode($this->smtp_username) . "\r\n"); if (!$this->_parseServer($socket, "334")) { fclose($socket); throw new Exception('Autorization error'); } fputs($socket, base64_encode($this->smtp_password) . "\r\n"); if (!$this->_parseServer($socket, "235")) { fclose($socket); throw new Exception('Autorization error'); } fputs($socket, "MAIL FROM: <".$this->smtp_username.">\r\n"); if (!$this->_parseServer($socket, "250")) { fclose($socket); throw new Exception('Error of command sending: MAIL FROM'); } $mailTo = ltrim($mailTo, '<'); $mailTo = rtrim($mailTo, '>'); fputs($socket, "RCPT TO: <" . $mailTo . ">\r\n"); if (!$this->_parseServer($socket, "250")) { fclose($socket); throw new Exception('Error of command sending: RCPT TO'); } fputs($socket, "DATA\r\n"); if (!$this->_parseServer($socket, "354")) { fclose($socket); throw new Exception('Error of command sending: DATA'); } fputs($socket, $contentMail."\r\n.\r\n"); if (!$this->_parseServer($socket, "250")) { fclose($socket); throw new Exception("E-mail didn't sent"); } fputs($socket, "QUIT\r\n"); fclose($socket); } catch (Exception $e) { return $e->getMessage(); } return true; } private function _parseServer($socket, $response) { while (@substr($responseServer, 3, 1) != ' ') { if (!($responseServer = fgets($socket, 256))) { return false; } } if (!(substr($responseServer, 0, 3) == $response)) { return false; } return true; } } ?> 

Second:

 require_once "SendMailSmtpClass.php"; // подключаем класс $mailSMTP = new SendMailSmtpClass('ksovreli2017@yandex.ru', 'nikusha0', 'ssl://smtp.yandex.ru', 'ksovrela', 465); // $mailSMTP = new SendMailSmtpClass('логин', 'пароль', 'хост', 'имя отправителя'); $headers= "MIME-Version: 1.0\r\n"; $headers .= "Content-type: text/html; charset=utf-8\r\n"; // кодировка письма $headers .= "From: $name <$email>\r\n"; // от кого письмо $result = $mailSMTP->send($to, $tema, $text, $headers); // $result = $mailSMTP->send('Кому письмо', 'Тема письма', 'Текст письма', 'Заголовки письма'); if($result === true){ echo "Письмо успешно отправлено!!!"; $date = date('dmY - H:i'); $res = mysql_query("INSERT INTO message(`to`,`name`,`email`,`title`,`text`,`login`,`date`) VALUES('$to','$name','$email','$tema','$text','$login','$date')"); echo mysql_error(); } else{ echo "проблема"; } 

Yandex letters reach without problems. But on mail.ru , gmail.com and others, it is sent then no. I do not know what's the matter, help.