Laravel - Notification Mail ShouldQueue does't work

Question

I would like to send email notifications using the queue.

I have created the queue table and tracked all the documentation related to this topic but the notifications are sent without going through the queue.

In my controller:

Notification::send(User::role('team')->get(), new NewExchangeToCollaboratorNotification($user, $exchange, $firstMessage));

And my notification code is:

<?php

namespace App\Notifications;

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

class NewExchangeToCollaboratorNotification extends Notification implements ShouldQueue
{
    use Queueable;

    protected $user; protected $exchange; protected $exchangeMessage; protected $replyToAddress;

    public function __construct($user, $exchange, $exchangeMessage)
    {
        $this->user = $user;
        $this->exchange = $exchange;
        $this->exchangeMessage = $exchangeMessage;
        $this->replyToAddress = Setting::get('MAIL_REPLY_TO_ADDRESS', env('MAIL_FROM_ADDRESS'));
    }

    public function via($notifiable)
    {
        return ['mail'];
    }

    public function toMail($notifiable)
    {
        return (new MailMessage)->view(
            'emails.exchanges.new',
            [
                'user' => $this->user,
                'exchangeMessage' => $this->exchangeMessage,
                'exchange' => $this->exchange
            ]
        )   ->subject('New exchange: ' .  $this->exchange->title)
            ->from(env('MAIL_FROM_ADDRESS'))
            ->replyTo($this->replyToAddress);
    }
}

Are the notifications queueable? Is there something I'm doing wrong? Thank you for your answers:)

EDIT: Add delay does not work too.

$when = now()->addMinutes(10);
Notification::send(User::role('team')->get(), (new NewExchangeToCollaboratorNotification($user, $exchange, $firstMessage))->delay($when));

EDIT 2: No failed job

Answer 1

Make sure your.env is: QUEUE_CONNECTION=database