pixelfed/app/Console/Commands/BannedEmailCheck.php

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use App\User;
use App\Services\EmailService;

class BannedEmailCheck extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'email:bancheck';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Checks user emails for banned domains';

    /**
     * Create a new command instance.
     *
     * @return void
     */
    public function __construct()
    {
        parent::__construct();
    }

    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        $users = User::whereNull('status')->get()->filter(function($u) {
            return EmailService::isBanned($u->email) == true;
        });

        foreach($users as $user) {
            $this->info('Found banned domain: ' . $user->email . PHP_EOL);
        }
    }
}