I have tried 3 different users to sign up but still, I got this error on debugging true. Users can be able to register with the sign-up.
Here is the debug error log.
POST https://forum.hittakursvinnare.info/register
Swift_TransportException: Failed to authenticate on SMTP server with username "forum@hittakursvinnare.info" using 2 possible authenticators. Authenticator LOGIN returned Expected response code 250 but got an empty response. Authenticator PLAIN returned Expected response code 250 but got an empty response. in file C:\inetpub\wwwroot\flarum\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Transport\Esmtp\AuthHandler.php on line 191
Stack trace:
- Swift_TransportException->() C:\inetpub\wwwroot\flarum\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Transport\Esmtp\AuthHandler.php:191
- Swift_Transport_Esmtp_AuthHandler->afterEhlo() C:\inetpub\wwwroot\flarum\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Transport\EsmtpTransport.php:371
- Swift_Transport_EsmtpTransport->doHeloCommand() C:\inetpub\wwwroot\flarum\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Transport\AbstractSmtpTransport.php:148
- Swift_Transport_AbstractSmtpTransport->start() C:\inetpub\wwwroot\flarum\vendor\swiftmailer\swiftmailer\lib\classes\Swift\Mailer.php:65
- Swift_Mailer->send() C:\inetpub\wwwroot\flarum\vendor\illuminate\mail\Mailer.php:521
- Illuminate\Mail\Mailer->sendSwiftMessage() C:\inetpub\wwwroot\flarum\vendor\illuminate\mail\Mailer.php:288
- Illuminate\Mail\Mailer->send() C:\inetpub\wwwroot\flarum\vendor\illuminate\mail\Mailer.php:212
- Illuminate\Mail\Mailer->raw() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Mail\Job\SendRawEmailJob.php:34
- Flarum\Mail\Job\SendRawEmailJob->handle() C:\inetpub\wwwroot\flarum\vendor\illuminate\container\BoundMethod.php:36
- Illuminate\Container\BoundMethod->Illuminate\Container{closure}() C:\inetpub\wwwroot\flarum\vendor\illuminate\container\Util.php:40
- Illuminate\Container\Util->unwrapIfClosure() C:\inetpub\wwwroot\flarum\vendor\illuminate\container\BoundMethod.php:93
- Illuminate\Container\BoundMethod->callBoundMethod() C:\inetpub\wwwroot\flarum\vendor\illuminate\container\BoundMethod.php:37
- Illuminate\Container\BoundMethod->call() C:\inetpub\wwwroot\flarum\vendor\illuminate\container\Container.php:614
- Illuminate\Container\Container->call() C:\inetpub\wwwroot\flarum\vendor\illuminate\bus\Dispatcher.php:128
- Illuminate\Bus\Dispatcher->Illuminate\Bus{closure}() C:\inetpub\wwwroot\flarum\vendor\illuminate\pipeline\Pipeline.php:128
- Illuminate\Pipeline\Pipeline->Illuminate\Pipeline{closure}() C:\inetpub\wwwroot\flarum\vendor\illuminate\pipeline\Pipeline.php:103
- Illuminate\Pipeline\Pipeline->then() C:\inetpub\wwwroot\flarum\vendor\illuminate\bus\Dispatcher.php:132
- Illuminate\Bus\Dispatcher->dispatchNow() C:\inetpub\wwwroot\flarum\vendor\illuminate\queue\CallQueuedHandler.php:120
- Illuminate\Queue\CallQueuedHandler->Illuminate\Queue{closure}() C:\inetpub\wwwroot\flarum\vendor\illuminate\pipeline\Pipeline.php:128
- Illuminate\Pipeline\Pipeline->Illuminate\Pipeline{closure}() C:\inetpub\wwwroot\flarum\vendor\illuminate\pipeline\Pipeline.php:103
- Illuminate\Pipeline\Pipeline->then() C:\inetpub\wwwroot\flarum\vendor\illuminate\queue\CallQueuedHandler.php:122
- Illuminate\Queue\CallQueuedHandler->dispatchThroughMiddleware() C:\inetpub\wwwroot\flarum\vendor\illuminate\queue\CallQueuedHandler.php:70
- Illuminate\Queue\CallQueuedHandler->call() C:\inetpub\wwwroot\flarum\vendor\illuminate\queue\Jobs\Job.php:98
- Illuminate\Queue\Jobs\Job->fire() C:\inetpub\wwwroot\flarum\vendor\illuminate\queue\SyncQueue.php:43
- Illuminate\Queue\SyncQueue->push() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\User\AccountActivationMailer.php:68
- Flarum\User\AccountActivationMailer->handle() C:\inetpub\wwwroot\flarum\vendor\illuminate\events\Dispatcher.php:412
- Illuminate\Events\Dispatcher->Illuminate\Events{closure}() C:\inetpub\wwwroot\flarum\vendor\illuminate\events\Dispatcher.php:237
- Illuminate\Events\Dispatcher->dispatch() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Foundation\DispatchEventsTrait.php:33
- Flarum\User\Command\RegisterUserHandler->dispatchEventsFor() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\User\Command\RegisterUserHandler.php:112
- Flarum\User\Command\RegisterUserHandler->handle() C:\inetpub\wwwroot\flarum\vendor\illuminate\bus\Dispatcher.php:122
- Illuminate\Bus\Dispatcher->Illuminate\Bus{closure}() C:\inetpub\wwwroot\flarum\vendor\illuminate\pipeline\Pipeline.php:128
- Illuminate\Pipeline\Pipeline->Illuminate\Pipeline{closure}() C:\inetpub\wwwroot\flarum\vendor\illuminate\pipeline\Pipeline.php:103
- Illuminate\Pipeline\Pipeline->then() C:\inetpub\wwwroot\flarum\vendor\illuminate\bus\Dispatcher.php:132
- Illuminate\Bus\Dispatcher->dispatchNow() C:\inetpub\wwwroot\flarum\vendor\illuminate\bus\Dispatcher.php:78
- Illuminate\Bus\Dispatcher->dispatch() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Api\Controller\CreateUserController.php:45
- Flarum\Api\Controller\CreateUserController->data() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Api\Controller\AbstractSerializeController.php:102
- Flarum\Api\Controller\AbstractSerializeController->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Api\Controller\AbstractCreateController.php:22
- Flarum\Api\Controller\AbstractCreateController->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Api\Client.php:72
- Flarum\Api\Client->send() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Forum\Controller\RegisterController.php:59
- Flarum\Forum\Controller\RegisterController->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\RouteHandlerFactory.php:38
- Flarum\Http\RouteHandlerFactory->Flarum\Http{closure}() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\ExecuteRoute.php:27
- Flarum\Http\Middleware\ExecuteRoute->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\kilowhat\flarum-ext-wordpress\src\Middlewares\LogoutOverrideMiddleware.php:16
- Kilowhat\Wordpress\Middlewares\LogoutOverrideMiddleware->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\kilowhat\flarum-ext-wordpress\src\Middlewares\LoginWarningMiddleware.php:21
- Kilowhat\Wordpress\Middlewares\LoginWarningMiddleware->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\kilowhat\flarum-ext-wordpress\src\Embed\WordpressEmbedNotFoundMiddleware.php:18
- Kilowhat\Wordpress\Embed\WordpressEmbedNotFoundMiddleware->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\FlarumPromotionHeader.php:29
- Flarum\Http\Middleware\FlarumPromotionHeader->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\ShareErrorsFromSession.php:57
- Flarum\Http\Middleware\ShareErrorsFromSession->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\CheckCsrfToken.php:44
- Flarum\Http\Middleware\CheckCsrfToken->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\ResolveRoute.php:67
- Flarum\Http\Middleware\ResolveRoute->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\SetLocale.php:50
- Flarum\Http\Middleware\SetLocale->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\AuthenticateWithSession.php:32
- Flarum\Http\Middleware\AuthenticateWithSession->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\RememberFromCookie.php:52
- Flarum\Http\Middleware\RememberFromCookie->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\StartSession.php:61
- Flarum\Http\Middleware\StartSession->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\CollectGarbage.php:46
- Flarum\Http\Middleware\CollectGarbage->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\ParseJsonBody.php:28
- Flarum\Http\Middleware\ParseJsonBody->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\HandleErrors.php:57
- Flarum\Http\Middleware\HandleErrors->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\MiddlewarePipe.php:84
- Laminas\Stratigility\MiddlewarePipe->process() C:\inetpub\wwwroot\flarum\vendor\middlewares\request-handler\src\RequestHandler.php:84
- Middlewares\RequestHandler->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\middlewares\base-path-router\src\BasePathRouter.php:101
- Middlewares\BasePathRouter->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Middleware\OriginalMessages.php:42
- Laminas\Stratigility\Middleware\OriginalMessages->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\middlewares\base-path\src\BasePath.php:73
- Middlewares\BasePath->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Middleware\ProcessIp.php:24
- Flarum\Http\Middleware\ProcessIp->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\Next.php:61
- Laminas\Stratigility\Next->handle() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\MiddlewarePipe.php:84
- Laminas\Stratigility\MiddlewarePipe->process() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-stratigility\src\MiddlewarePipe.php:73
- Laminas\Stratigility\MiddlewarePipe->handle() C:\inetpub\wwwroot\flarum\vendor\laminas\laminas-httphandlerrunner\src\RequestHandlerRunner.php:96
- Laminas\HttpHandlerRunner\RequestHandlerRunner->run() C:\inetpub\wwwroot\flarum\vendor\flarum\core\src\Http\Server.php:44
- Flarum\Http\Server->listen() C:\inetpub\wwwroot\flarum\public\index.php:22