settings.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Email configuration page
 *
 * @package   message_csmtpemail
 * @copyright 2011 Lancaster University Network Services Limited
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die;

if ($ADMIN->fulltree) {
    if($DB->record_exists('config_plugins',array('plugin'=>'local_custonsmtp'))){
        //Adionar contas
        $accounts = $DB->get_records('custonsmtp_accounts');
        $accountsArray = array(0=>'Não gereciar');
        foreach($accounts as $account){
            $accountsArray[$account->id] =$account->name;
        }
    
        $settings->add(new admin_setting_configselect('message_csmtpemail/mmsmtp', 'SMTP Usado','Conta de SMTP usada para enviar mensagens nesse plugin',null,$accountsArray));
    }
}