laravel不想发送电子邮件且没有错误

Question

我正在一个简单的laravel网站上工作。 我需要发送电子邮件（联系表格）。我用mailtrap测试了我的代码，但是没有用。我花了一些时间，但找不到解决方案。

我的联系表格：

<form method="post" action="{{ route('sendContactEmail') }}">
                        @csrf
                            <div class="input_contact">
                                <input type="text" name="name" class="form_name">
                            </div>
                            <div class="input_contact">
                                <input type="email" name="email" class="form_email">
                            </div>
                            <div class="input_contact">
                                <input type="text" name="phone" class="form_phone">
                            </div>
                            <div class="input_contact">
                                <input type="text" name="text" class="form_message">
                            </div>
                            <button type="submit" class="submit_contact"> Envoyer </button>
                        </form>

接收请求的我的控制器：

public function sendContactEmail ( Request $request ){
        $this->validate($request, [
            'name' => 'required|max:255|string',
            'email' => 'required|email|max:255',
            'phone' => 'required|max:255|string',
            'message' => 'required'
        ]);
        Notification::route('mail','test@gmail.com')
                                    ->notify(new SendContactNotification($request));

        return $request;
    }

和我的SendContactNotification：

<?php

namespace App\Notifications;

use Illuminate\Bus\Queueable;
use Illuminate\Notifications\Notification;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Messages\MailMessage;

class SendContactNotification extends Notification
{
    use Queueable;
    protected $request;
    /**
     * Create a new notification instance.
     *
     * @return void
     */
    public function __construct($request)
    {
        $this->request = $request;
    }

    /**
     * Get the notification's delivery channels.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function via($notifiable)
    {
        return ['mail'];
    }

    /**
     * Get the mail representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return \Illuminate\Notifications\Messages\MailMessage
     */
    public function toMail($notifiable)
    {
        return (new MailMessage)
                    ->subject('Contact via escapehome.ch')
                    ->line('Nom : ' . $this->request->name)
                    ->line('Téléphone : ' . $this->request->phone)
                    ->line('Message : '. $this->request->message)
                    ->action('Répondre', url('mailto:'.$this->request->email));
    }

    /**
     * Get the array representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function toArray($notifiable)
    {
        return [
            //
        ];
    }
}

对于我的.env：

MAIL_DRIVER=smtp
MAIL_HOST=smtp.mailtrap.io
MAIL_PORT=465
MAIL_USERNAME=( my username mailtrap  )
MAIL_PASSWORD=( my password mailtrap ) 

提交表单时，我没有错误消息。 谢谢。