修改配置文件(config/web.php)'mailer' => [    'class' => 'yii/swiftmailer/Mailer',    'useFileTransport' => false,    'transport' => [	    'class' => 'Swift_SmtpTransport',  	    'host' => 'smtp.163.com',  //每種郵箱的host配置不一樣	    'username' => '18903181076@163.com',	//發件人郵箱	    'passWord' => 'xgslagfpomsxuseq',	//授權碼	    'port' => '25',  	    'encryption' => 'tls',    ],       'messageConfig'=>[  	    'charset'=>'UTF-8',  	    'from'=>['18903181076@163.com'=>'nickname']  //發件人昵稱    ],],控制器發送郵件$mail = Yii::$app->mailer->compose();$mail->setTo('****@QQ.com');	//接收人郵箱$mail->setSubject("test");	//郵件標題$mail->setHtmlBody("發送內容發送內容發送內容");	//發送內容(可寫HTML代碼)if ($mail->send()){	echo "成功";}else{	echo "失敗";}如果發送頁面$mail = Yii::$app->mailer->compose("email");	//在mail文件夾下創建頁面文件，在文件內編輯內容$mail->setTo('****@qq.com');	//接收人郵箱$mail->setSubject("test");	//郵件標題if ($mail->send()){	echo "成功";}else{	echo "失敗";}