main.php(或main-local.php)中的邮件配置如下：

‘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,//false发送邮件，true只是生成邮件在runtime文件夹下，不发邮件    ‘transport‘ => [        ‘class‘ => ‘Swift_SmtpTransport‘,        ‘host‘ => ‘smtp.163.com‘,  //每种邮箱的host配置不一样        ‘username‘ => ‘zhong_mail_test‘,        ‘password‘ => ‘**********‘,//163邮箱的授权码        ‘port‘ => ‘25‘,        ‘encryption‘ => ‘tls‘,    ],    ‘messageConfig‘=>[        ‘charset‘=>‘UTF-8‘,        ‘from‘=>[‘zhong_mail_test@163.com‘=>‘zhong-mail‘]    ],],

发送邮件的代码如下：

return Yii::$app    ->mailer    ->compose(        [‘html‘ => ‘passwordResetToken-html‘, ‘text‘ => ‘passwordResetToken-text‘],        [‘user‘ => $user]    )    ->setFrom([Yii::$app->params[‘supportEmail‘] => Yii::$app->name . ‘ robot‘])    ->setTo($this->email)    ->setSubject(‘Password reset for ‘ . Yii::$app->name)    ->send();

如就按照上述配置会报：

Expected response code 250 but got code "553", with message "553 Mail from must equal authorized user
"

这是因为有些邮件服务器要求from和username必须一致，163邮箱就是这样。

为避免这个问题，我们可以将发件代码中的setFrom设置去掉，或者在param.php(或param-local.php)中配置supportEmail参数：

‘supportEmail‘ => ‘zhong_mail_test@163.com‘

这样就能成功发送邮件了。

上面那个是配置supportEmail参数发出的邮件，下面这个是注释掉setFrom发出的邮件。

具体邮件内容的配置在common/mail目录下。

关于163邮箱的授权码：登录-》设置-》POP3/SMTP/IMAP-》按提示开启SMTP即可。

yii2邮件配置教程，报Expected response code 250 but got code "553"原因