Yii 2 mailer dont send mail and dont display errors

[nnpa]

config
'components' => [
'mailer' => [
'class' => 'yii\swiftmailer\Mailer',
'transport' => [
'class' => 'Swift_SmtpTransport',
'host' => 'smtp.send-box.ru',
'username' => '[email protected]',
'password' => 'password',
'port' => '587',
'encryption' => 'tls',
],
],

    Yii::$app->mailer->compose()
    ->setFrom('[email protected]')
    ->setTo('[email protected]')
    ->setSubject('Тема сообщения')
    ->setTextBody('Текст сообщения')
    ->setHtmlBody('<b>текст сообщения в формате HTML</b>')
    ->send();

code return true witout errors (when config has errors)
mail not send
Why?