具体方法如下所示：

（学习视频分享：编程入门）

1、首先在qq邮箱的设置中开启POP3/SMTP服务

保存下授权码

在Yii2配置文件中(common/config/main.php中components)添加邮箱组件

'mailer' => [            'class' => 'yii\swiftmailer\Mailer',            'viewPath' => '@common/mail',            // 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' => [                //这里如果你是qq的邮箱，可以参考qq客户端设置后再进行配置 http://service.mail.qq.com/cgi-bin/help?subtype=1&&id=28&&no=1001256                'class' => 'Swift_SmtpTransport',                'host' => 'smtp.qq.com',                // qq邮箱                'username' => '114***6@qq.com',                //授权码, 什么是授权码， http://service.mail.qq.com/cgi-bin/help?subtype=1&&id=28&&no=1001256                'password' => '***',                 'port' => '465',                'encryption' => 'ssl',             ],            'messageConfig'=>[                'charset'=>'UTF-8',                'from'=>['114***@qq.com'=>'developer']            ],        ],

调用邮箱接口发送邮件

public function actionSendmail()    {        $mail = \YII::$app->mailer->compose();        $mail->setTo("***@qq.com");        $mail->setSubject("邮件测试");        $mail->setTextBody("textbody 25 ok?");//发布纯文字文本        //$mail->setHtmlBody("htmlbody");//发布可以带html标签的文本        if($mail->send()){            echo "success";        }else{            echo "failure";        }    }

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