roundcube/roundcubemail — pull request #182 by amedeomantica (2014-05-06 16:03:39+00:00)
Title: Authorized email domain support

You can add authorizedDomains.inc.php in the config directory containing an array of domains who are allowed to login

Example:

$config['authorizedDomains'] = [
"myOwnDomain.com",
"anotherTrusteDdomain.com"
];