Yii2使用swiftmailer发送邮件的方法

'mail' => [    'class' => 'yii/swiftmailer/Mailer',    'viewPath' => '@backend/mail',    'useFileTransport' => false,//set this property to false to send mails to real email addresses    //comment the following array to send mail using php's mail function    'transport' => [      'class' => 'Swift_SmtpTransport',      'host' => 'smtp.gmail.com',      'username' => 'username@gmail.com',      'password' => 'password',      'port' => '587',      'encryption' => 'tls',     ],  ],],

Yii::$app->mail->compose('your_view', ['params' => $params]) ->setFrom([/Yii::$app->params['supportEmail'] => 'Test Mail']) ->setTo('to_email@xx.com') ->setSubject('This is a test mail ' ) ->send();