FallbackMailChannel para Laravel Notifications

FallbackMailChannel.php

<?php

namespace App\Channels;

use Illuminate\Mail\Mailer;
use Illuminate\Mail\Markdown;
use Illuminate\Mail\TransportManager;
use Illuminate\Notifications\Channels\MailChannel;

class FallbackMailChannel extends MailChannel
{
    public function __construct(Mailer $mailer, Markdown $markdown)
    {
        foreach (['HOST', 'PORT', 'USERNAME', 'PASSWORD', 'ENCRYPTION', 'FROM_ADDRESS'] as $param) {
            $suffix = strtolower($param);
            if ($param === 'FROM_ADDRESS') {
                $suffix = 'from.address';
            }

            config()->set("mail.{$suffix}", env("MAIL_{$param}_ALT"));
        }


        app()->singleton('swift.transport', function ($app) {
            return new TransportManager($app);
        });

        $swift = new \Swift_Mailer(app('swift.transport')->driver());
        $mailer->setSwiftMailer($swift);
        $mailer->alwaysFrom(config('mail.from.address'), config('mail.from.name'));

        parent::__construct($mailer, $markdown);
    }

}