I join. When trying to login for a long-existing user, the following lines are added to the /var/log/roundcube/errors.log file:
[05-Aug-2022 10:13:47 UTC] PHP Warning: Undefined array key "ssl_mode" in /var/lib/roundcube/program/lib/Roundcube/rcube_imap_generic.php on line 1053
[05-Aug-2022 10:13:47 +0000]: <hd5e3hah> PHP Error: Access denied for new user [email protected] 'auto_create_user' is disabled in
/var/lib/roundcube/program/include/rcmail.php on line 815 (POST /?_task=login&_action=login)
// Automatically register user in Roundcube database on successful (IMAP) logon.
// Set to false if only registered users should be allowed to the webmail.
// Note: If disabled you have to create records in Roundcube users table by yourself.
// Note: Roundcube does not manage/create users on a mail server.
['auto_create_user'] = true;