Mail setting in Yii2

web.php

// SMTP settings to send mail in yii2
'mailer' => [
            'class' => 'yii\swiftmailer\Mailer',
            // send all mails to a file by default. You have to set
            // 'useFileTransport' to false and configure a transport
            // for the mailer to send real emails.
            'useFileTransport' => false,
            'transport' => [
            'class' => 'Swift_SmtpTransport',
            'host' => 'smtp.gmail.com',
            'username' => '[email protected]',
            'password' => '******', // email account password
            'port' => '587',
            'encryption' => 'tls',
            ],
        ],