setting email yii2

/* begin Setting Email from gmail*/
         'mailer' => [
             'class' => 'yii\swiftmailer\Mailer',
             'useFileTransport' => false,
             'transport' => [
                 'class' => 'Swift_SmtpTransport',
                 'host' => 'smtp.gmail.com',
                 'username' => 'yourmail@gmail.com',
                 'password' => 'yourpassword',
                 'port' => '465',
                 'encryption' => 'ssl',
                 'streamOptions' => [
                     'ssl' => [
                         'allow_self_signed' => true,
                         'verify_peer' => false,
                         'verify_peer_name' => false,
                     ],
                 ],
             ]
         ],
        /* end Setting Email from gmail*/