无法与主机mailtrap.io建立连接[php_network_getaddresses:getaddrinfo failed:没有这样的主机已知.#0]

我收到以下错误:

无法与主机smtp.gmail.com建立连接[php_network_getaddresses:getaddrinfo failed:没有这样的主机已知.

0]

我的.env文件看起来像:

MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
MAIL_USERNAME=xxxxxxxxxxxxxx
MAIL_PASSWORD=xxxxxxxx
#MAIL_ENCRYPTION=null

我在config中的mail.php文件看起来像:

/*
    |--------------------------------------------------------------------------
    | Mail Driver
    |--------------------------------------------------------------------------
    |
    | Laravel supports both SMTP and PHP's "mail" function as drivers for the
    | sending of e-mail. You may specify which one you're using throughout
    | your application here. By default, Laravel is setup for SMTP mail.
    |
    | Supported: "smtp", "mail", "sendmail", "mailgun", "mandrill",
    |            "ses", "sparkpost", "log"
    |
    */

    'driver' => env('MAIL_DRIVER', 'smtp'),

    /*
    |--------------------------------------------------------------------------
    | SMTP Host Address
    |--------------------------------------------------------------------------
    |
    | Here you may provide the host address of the SMTP server used by your
    | applications. A default option is provided that is compatible with
    | the Mailgun mail service which will provide reliable deliveries.
    |
    */

    'host' => env('MAIL_HOST', 'smtp.mailgun.org'),

    /*
    |--------------------------------------------------------------------------
    | SMTP Host Port
    |--------------------------------------------------------------------------
    |
    | This is the SMTP port used by your application to deliver e-mails to
    | users of the application. Like the host we have set this value to
    | stay compatible with the Mailgun e-mail application by default.
    |
    */

    'port' => env('MAIL_PORT', 587),

    /*
    |--------------------------------------------------------------------------
    | Global "From" Address
    |--------------------------------------------------------------------------
    |
    | You may wish for all e-mails sent by your application to be sent from
    | the same address. Here, you may specify a name and address that is
    | used globally for all e-mails that are sent by your application.
    |
    */

    'from' => ['address' => null, 'name' => null],

    /*
    |--------------------------------------------------------------------------
    | E-Mail Encryption Protocol
    |--------------------------------------------------------------------------
    |
    | Here you may specify the encryption protocol that should be used when
    | the application send e-mail messages. A sensible default using the
    | transport layer security protocol should provide great security.
    |
    */

    'encryption' => env('MAIL_ENCRYPTION', 'tls'),

    /*
    |--------------------------------------------------------------------------
    | SMTP Server Username
    |--------------------------------------------------------------------------
    |
    | If your SMTP server requires a username for authentication, you should
    | set it here. This will get used to authenticate with your server on
    | connection. You may also set the "password" value below this one.
    |
    */

    'username' => env('MAIL_USERNAME'),

    /*
    |--------------------------------------------------------------------------
    | SMTP Server Password
    |--------------------------------------------------------------------------
    |
    | Here you may set the password required by your SMTP server to send out
    | messages from your application. This will be given to the server on
    | connection so that the application will be able to send messages.
    |
    */

    'password' => env('MAIL_PASSWORD'),

    /*
    |--------------------------------------------------------------------------
    | Sendmail System Path
    |--------------------------------------------------------------------------
    |
    | When using the "sendmail" driver to send e-mails, we will need to know
    | the path to where Sendmail lives on this server. A default path has
    | been provided here, which will work well on most of your systems.
    |
    */

    'sendmail' => '/usr/sbin/sendmail -bs',

];

令人惊讶的是我在过去的6个月里使用它并且它没有早先出错,但现在当我再次上传我的内置时,我得到了这个错误.

任何建议都将受到高度赞赏.

当对文件，特别是.env文件进行了某些更改时，会发生此问题

使用artisan命令清除缓存

php artisan cache:clear

清除配置

php artisan config:clear

重新启动服务器

sudo service apache2 restart

更多：尝试清除浏览器的缓存和Cookie。希望能奏效

我刚遇到同样的问题.

看起来服务器无法ping目标地址.

我快速重启了我的开发服务器,一切恢复正常.

希望有所帮助.