mailproviders.php

См. документацию.

<?php
 
namespace Bitrix\Main\Controller\Mail;
 
use Bitrix\Main\Engine\Controller;
use Bitrix\Main\Mail\Providers;
 
class MailProviders extends Controller
{
    public function getShowcaseParamsAction(bool $isSender = false): array
    {
        $showcaseParams = new Providers\ShowcaseParams($isSender);
 
        return $showcaseParams->getParams();
    }
}