ext_emconf.php

<?php
$EM_CONF[$_EXTKEY] = [
    'title' => 'Mailing list',
    'description' => 'Authenticated FE users can send bunch of messages to a list of recipients. This list is defined as a dynamic selection in a FE module (Vidi).',
    'author' => 'Fabien Udriot',
    'author_email' => 'fabien@ecodev.ch',
    'state' => 'stable',
];