$registrationMail = [
    'title' => 'Registrazione albergatore su portale BeTrivius',
    'url' => URL::to('/').'/activate?email='.$data['email'].'&token='.$token,
    'email' => $data['email'],
    'name' => $data['name'],
    'surname' => $data['surname']
];

Mail::send('emails.registrationMail', $registrationMail, function($message) {
    $message->to('mail@gmail.com', 'recipient-name')->subject('email subject');
});

Mail::send('emails.registrationMail', $registrationMail, function($message) {

    $message->to($registrationMail['email'], $data['name'].' '.$data['surname'])->subject('titolo');
});

Mail::send('emails.registrationMail', $registrationMail, function($message, $registrationMail) {

    $message->to($registrationMail['email'], $registrationMail['name'].' '.$registrationMail['surname'])->subject('titolo');
});

ErrorException in RegistrationController.php line 90:
Missing argument 2 for AppHttpControllersRegistrationController::AppHttpControllers{closure}()
in RegistrationController.php line 90
at HandleExceptions->handleError(2, 'Missing argument 2 for App\Http\Controllers\RegistrationController::App\Http\Controllers\{closure}()', 'C:\xampp\htdocs\HotelRegistration\app\Http\Controllers\RegistrationController.php', 90, array('message' => object(Message))) in RegistrationController.php line 90
at RegistrationController->AppHttpControllers{closure}(object(Message))
at call_user_func(object(Closure), object(Message)) in Mailer.php line 199
at Mailer->send('emails.registrationMail', array('title' => 'Registrazione albergatore su portale BeTrivius', 'url' => 'http://laravel.dev/activate?email=nobili.andrea@gmail.com&token=4759d4ec56cf1e63447638e0d7a042e6', 'email' => 'nobili.andrea@gmail.com', 'name' => 'Andrea', 'surname' => 'Nobili'), object(Closure)) in Facade.php line 221
at Facade::__callStatic('send', array('emails.registrationMail', array('title' => 'Registrazione albergatore su portale BeTrivius', 'url' => 'http://laravel.dev/activate?email=nobili.andrea@gmail.com&token=4759d4ec56cf1e63447638e0d7a042e6', 'email' => 'nobili.andrea@gmail.com', 'name' => 'Andrea', 'surname' => 'Nobili'), object(Closure))) in RegistrationController.php line 93
at Mail::send('emails.registrationMail', array('title' => 'Registrazione albergatore su portale BeTrivius', 'url' => 'http://laravel.dev/activate?email=nobili.andrea@gmail.com&token=4759d4ec56cf1e63447638e0d7a042e6', 'email' => 'nobili.andrea@gmail.com', 'name' => 'Andrea', 'surname' => 'Nobili'), object(Closure)) in RegistrationController.php line 93
at RegistrationController->store(object(Request))
at call_user_func_array(array(object(RegistrationController), 'store'), array(object(Request))) in Controller.php line 55
at Controller->callAction('store', array(object(Request))) in ControllerDispatcher.php line 44

Mail::send('emails.registrationMail', $registrationMail, function($message, $registrationMail) {