UserController.php

    private function sendWelcomeEmail(User $user)
    {
        // Enabling pretend mode for developers
        // Writing email in logs instead of really sending them.
        if (App::environment('development')) {
            Mail::pretend();
        }

        $data = [];

        Mail::queue('success_email', $data, function($message)
        {
            $message->to($user->email, $user->firstname . ' ' . $user->lastname);
        });
    }