MAIL_DRIVER=smtp
MAIL_HOST=mail.example.com
MAIL_PORT=25
MAIL_USERNAME=system@example.com
MAIL_PASSWORD=123
MAIL_ENCRYPTION=null

Route::post('/ajaxSendEmail', [ 'as' => 'ajaxSendEmail','uses' =>'MyController@ajaxSendEmail' ] );

$.ajaxSetup({
    headers: {
     'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
   }
});
$.ajax({
    url: "{{ route('ajaxSendEmail')}}",
    type: "POST",
    cache: false,
    dataType: "json",
    timeout: 10000,
    error: function (error) {
        alert('ajax error');
    }
});

public function ajaxSendEmail()
  {
     Mail::send('email.feedback', ['data'=> 'Hello Mail'], function ($message) {
        $message->from('service@faciwedding.com', 'FACI');
        $message->to('service@faciwedding.com');
        $message->subject('靈感牆回饋');
    });

    $r['returnData'] = true;
    return response()->json($r);
  }

<h1>{{ $data }}</h1>