Debian Stretch, roundcube 1.2.3+dfsg.1-4+deb9u1
Roundcube has created new user_id, with mail_host as FQDN and not localhost as previously. last_login with user where mail_host is localhost was 21. March, last thursday login is mail_host FQDN. I have not knowingly changed anything in a month, except installe ISPConfig 3 Rouncube plugins, so I do not understand why Roundcube now thinks host is the FQDN, localhost worked since 6th december.
Can I fix this in the database so address books etc of these two users are merged together?
How can I force Roundcube to not do this anymore? I have set
$config['login_lc'] = 2;
to get all lowercase username and domain part, and
$config['default_host'] = 'localhost';
is in both config.inc.php and defaults.inc.php. When log in, I can not see any way to select the mail_host, so it it strange Roundcube does not use localhost anymore.