PHPMailer does not work with Yandex smtp. Wrong login or password?

Question

Yandex

Hello. Can't connect to Yandex smtp server via phpmailer. An error

SMTP -> ERROR: Password not accepted from server: 535 Incorrect authentication data 
SMTP Error: Could not authenticate.

I enter the correct username and password. This is what the send mail script looks like.

require 'mailer/class.phpmailer.php';
  $Mailer = new PHPMailer();
  $Mailer->SMTPDebug = 1;
  $Mailer->CharSet = 'UTF-8';
  $Mailer->IsSMTP();
  $Mailer->Host = 'smtp.yandex.ru';
  $Mailer->Port = 25;
  $Mailer->SMTPAuth = true;
  $Mailer->Username = '[email protected]';
  $Mailer->Password = 'password';

  $Mailer->SetFrom('[email protected]', 'Владимир');
  $Mailer->AddAddress($_GET['email'], $_GET['name']);
  $Mailer->Subject = 'Проверка отправки почты';
  $Mailer->Body = 'Тестовое сообщение.';

  if($Mailer->Send()) echo 'true'; else echo 'false';

Login and password are 100% correct, checked 100 times, connected with the same login and password through other programs.

Answer 1

$mail->SMTPSecure = 'tls'
try (pulled from my working code)

Answer 2

The problem was that I was transferring mail for a domain from one Yandex account to another. A day later, the smtp connection itself worked, with the same data and settings.

Answer 3

Doesn't work because
$Mailer->AltBody = 'Test message.';