my_form=document.createElement('FORM');
                   my_form.name = 'delete';
                   my_form.method='DELETE';
                   my_form.action= this.value;
                   my_form.submit();<button> и все вынес в javascript. Я вот думаю еще и button заменить на какой-нибудь <li>        public function sendAction(Request $request, $template='admin.notification') 
    {
        $this->validate($request, [
            'name' => 'required',
            'email' => 'required',
            'subject' => 'required'
        ]);
        $name = htmlspecialchars($request->name);
        $subject = htmlspecialchars($request->subject);
        $toAddresses = env('MAIL_USERNAME');
       !! Session::flash('body', htmlspecialchars($request->message)); !!
        $fromAddress = $request['email'];
        $IP = $_SERVER['REMOTE_ADDR'];
              
        Mail::send($template, $request->all(), function($message) use ($toAddresses, $fromAddress, $name , $subject) {
                     
            $message->to($toAddresses)->subject($subject)->from($toAddresses, $name)->replyTo($fromAddress, $name);
        });
            Session::flash('success', 'Сообщение отправлено!');
        return redirect('contacts');
    }