Swift_TransportException in AbstractSmtpTransport.php line 383:

I'm trying to create a contact form and I added my server email details to the .env and the mail.php but I'm getting this error

Swift_TransportException in AbstractSmtpTransport.php line 383: Expected response code 250 but got code "421", with message "421 Unexpected failure, please try later "
If I try this and I use mailtrap it works fine.

This is my mail.php

return [

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

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

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

    'from' => [
        'address' => env('MAIL_FROM_ADDRESS', '[email protected]'),
        'name' => env('MAIL_FROM_NAME', 'Info'),
    ],

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

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

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

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

    'markdown' => [
        'theme' => 'default',

        'paths' => [
            resource_path('views/vendor/mail'),
        ],
    ],

];

My .env file

MAIL_DRIVER=smtp
MAIL_HOST=hosting.com
MAIL_PORT=587
[email protected]
MAIL_PASSWORD=password
MAIL_ENCRYPTION=

and this is in my laravel.log file. I'm not quite sure where to look to see where the actual error is

[2017-05-24 07:33:25] local.ERROR: exception 'Swift_TransportException' with message 'Expected response code 250 but got code "421", with message "421 Unexpected failure, please try later
"' in C:\xampp\htdocs\website\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Transport\AbstractSmtpTransport.php:383
Stack trace:
#0 C:\xampp\htdocs\website\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Transport\AbstractSmtpTransport.php(281): Swift_Transport_AbstractSmtpTransport->_assertResponseCode('421 Unexpected ...', Array)
#1 C:\xampp\htdocs\website\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Transport\EsmtpTransport.php(270): Swift_Transport_AbstractSmtpTransport->executeCommand('\r\n.\r\n', Array, Array)
#2 C:\xampp\htdocs\website\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Transport\AbstractSmtpTransport.php(333): Swift_Transport_EsmtpTransport->executeCommand('\r\n.\r\n', Array)
#3 C:\xampp\htdocs\website\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Transport\AbstractSmtpTransport.php(428): Swift_Transport_AbstractSmtpTransport->_streamMessage(Object(Swift_Message))
#4 C:\xampp\htdocs\website\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Transport\AbstractSmtpTransport.php(444): Swift_Transport_AbstractSmtpTransport->_doMailTransaction(Object(Swift_Message), 'cerberus478@gma...', Array, Array)
#5 C:\xampp\htdocs\website\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Transport\AbstractSmtpTransport.php(176): Swift_Transport_AbstractSmtpTransport->_sendTo(Object(Swift_Message), 'cerberus478@gma...', Array, Array)
#6 C:\xampp\htdocs\website\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Mailer.php(85): Swift_Transport_AbstractSmtpTransport->send(Object(Swift_Message), Array)
#7 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Mail\Mailer.php(440): Swift_Mailer->send(Object(Swift_Message), Array)
#8 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Mail\Mailer.php(211): Illuminate\Mail\Mailer->sendSwiftMessage(Object(Swift_Message))
#9 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Support\Facades\Facade.php(221): Illuminate\Mail\Mailer->send('templates::emai...', Array, Object(Closure))
#10 C:\xampp\htdocs\website\app\Modules\Open\Http\Controllers\OpenController.php(102): Illuminate\Support\Facades\Facade::__callStatic('send', Array)
#11 C:\xampp\htdocs\website\app\Modules\Open\Http\Controllers\OpenController.php(102): Illuminate\Support\Facades\Mail::send('templates::emai...', Array, Object(Closure))
#12 [internal function]: App\Modules\Open\Http\Controllers\OpenController->contact()
#13 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Controller.php(55): call_user_func_array(Array, Array)
#14 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\ControllerDispatcher.php(44): Illuminate\Routing\Controller->callAction('contact', Array)
#15 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Route.php(204): Illuminate\Routing\ControllerDispatcher->dispatch(Object(Illuminate\Routing\Route), Object(App\Modules\Open\Http\Controllers\OpenController), 'contact')
#16 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Route.php(160): Illuminate\Routing\Route->runController()
#17 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Router.php(559): Illuminate\Routing\Route->run()
#18 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(30): Illuminate\Routing\Router->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#19 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Middleware\SubstituteBindings.php(41): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#20 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Routing\Middleware\SubstituteBindings->handle(Object(Illuminate\Http\Request), Object(Closure))
#21 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#22 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\VerifyCsrfToken.php(65): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#23 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Foundation\Http\Middleware\VerifyCsrfToken->handle(Object(Illuminate\Http\Request), Object(Closure))
#24 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#25 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\View\Middleware\ShareErrorsFromSession.php(49): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#26 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\View\Middleware\ShareErrorsFromSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#27 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#28 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Session\Middleware\StartSession.php(64): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#29 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Session\Middleware\StartSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#30 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#31 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse.php(37): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#32 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse->handle(Object(Illuminate\Http\Request), Object(Closure))
#33 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#34 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Cookie\Middleware\EncryptCookies.php(59): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#35 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Cookie\Middleware\EncryptCookies->handle(Object(Illuminate\Http\Request), Object(Closure))
#36 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#37 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(102): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#38 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Router.php(561): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#39 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Router.php(520): Illuminate\Routing\Router->runRouteWithinStack(Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request))
#40 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Router.php(498): Illuminate\Routing\Router->dispatchToRoute(Object(Illuminate\Http\Request))
#41 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php(174): Illuminate\Routing\Router->dispatch(Object(Illuminate\Http\Request))
#42 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(30): Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}(Object(Illuminate\Http\Request))
#43 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\TransformsRequest.php(30): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#44 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure))
#45 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#46 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\TransformsRequest.php(30): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#47 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure))
#48 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#49 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\ValidatePostSize.php(27): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#50 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Foundation\Http\Middleware\ValidatePostSize->handle(Object(Illuminate\Http\Request), Object(Closure))
#51 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#52 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode.php(46): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#53 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(148): Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode->handle(Object(Illuminate\Http\Request), Object(Closure))
#54 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#55 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php(102): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#56 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php(149): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#57 C:\xampp\htdocs\website\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php(116): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter(Object(Illuminate\Http\Request))
#58 C:\xampp\htdocs\website\public\index.php(54): Illuminate\Foundation\Http\Kernel->handle(Object(Illuminate\Http\Request))
#59 {main}  

111