Roundcube настроен так:
$rcmail_config['smtp_server'] = 'localhost';
$rcmail_config['smtp_port'] = 25;
$rcmail_config['smtp_user'] = '%u';
$rcmail_config['smtp_pass'] = '%p';
$rcmail_config['smtp_auth_type'] = '';
$rcmail_config['smtp_auth_cid'] = null;
$rcmail_config['smtp_auth_pw'] = null;
$rcmail_config['smtp_helo_host'] = 'localhost.localdomain';
$rcmail_config['smtp_timeout'] = 0;
при попытке отправить почту вываливается ошибка:
[27-May-2013 21:44:05 +0400]: SMTP Error: SMTP error: Authentication failure: SMTP server does not support authentication (Code: ) in /usr/share/roundcubemail/program/include/rcmail.php on line 1009 (POST /mail/?_unlock=loading1369676645733&_lang=ru?_task=mail&_action=send)
При этом smtp авторизация через thunderbird проходит наура.