fix: Email should be retried with backoff

app/Notifications/CustomEmailNotification.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Notifications;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Notifications\Notification;
+
+class CustomEmailNotification extends Notification implements ShouldQueue
+{
+    use Queueable;
+
+    public $backoff = [10, 20, 30, 40, 50];
+
+    public $tries = 5;
+
+    public $maxExceptions = 5;
+}