GuzzleHttp\Exception\ClientException: Client error: `POST https://api.mailgun.net/v3/sandbox16b1677378c94898bfcf330419ff839f.mailgun.or...

[SerafimArts]

https://sentry.io/laravel-rus/stage-laravel-su/issues/229675975/

GuzzleHttp\Exception\ClientException: Client error: `POST https://api.mailgun.net/v3/sandbox16b1677378c94898bfcf330419ff839f.mailgun.org/messages.mime` resulted in a `400 BAD REQUEST` response:
{
  "message": "Sandbox subdomains are for test purposes only. Please add your own domain or add the address to authoriz (truncated...)

  File "app/Models/User/EmailConfirmationObserver.php", line 44, in created
    $user->notify($confirmation);
  File "app/Http/Controllers/Auth/RegistrationController.php", line 43, in register
    $user = User::create($request->only('name', 'email', 'password'));
  File "app/Http/Middleware/RedirectIfAuthenticated.php", line 35, in handle
    return $next($request);
  File "app/Http/Middleware/CurrentPageState.php", line 77, in handle
    $response = $next($request);
...
(85 additional frame(s) were not displayed)

Надо наверное сконфижить почту для поддомена. Не горит.