TYPO3 MAIL settings for Gmail / G-Suite TLS connection

AdditionalConfiguration_TemplateForMailSetting.php

<?php
declare(strict_types=1);

// Override configuration of LocalConfiguration
$customChanges = [
    'MAIL' => [
        'defaultMailFromAddress' => '[email protected]',
        'defaultMailFromName' => 'My Name',
        'transport' => 'smtp',
        'transport_smtp_encrypt' => 'tls',
        'transport_smtp_password' => 'myPassWordBro',
        'transport_smtp_server' => 'smtp.gmail.com:587',
        'transport_smtp_username' => '[email protected]',
    ],
];

$GLOBALS['TYPO3_CONF_VARS'] = array_replace_recursive($GLOBALS['TYPO3_CONF_VARS'], $customChanges);