提示 在端口23链接失败

是open smtp.163.com吗？

我按教程做了一个 但是收不到邮件 也不报错
.env文件

MAIL_DRIVER=smtp
MAIL_HOST=smtp.163.com
MAIL_PORT=25
[email protected]
MAIL_PASSWORD=1***
MAIL_ENCRYPTION=null

mail.php

return [
    'driver' => env('MAIL_DRIVER', 'smtp'),
    'host' => env('MAIL_HOST', 'smtp.mailgun.org'),
    'port' => env('MAIL_PORT', 587),
    'from' => ['address' => '[email protected]', 'name' => 'test'],
    'encryption' => env('MAIL_ENCRYPTION', 'tls'),
    'username' => env('MAIL_USERNAME'),
    'password' => env('MAIL_PASSWORD'),
    'sendmail' => '/usr/sbin/sendmail -bs',
    'pretend' => false,
];