I'm having an issue that I see some others have had, but nobody's solution has worked for me.
This is a fresh installation of Roundcube v1.2 on a new CentOS 7.2.1511 server. I'm using mod_security, but it's in log only mode. I'm not using Suhosin.
Strangely, when I tail the following logs, I see no record of the login attempt.
tail -n0 -f messages secure maillog httpd/access_log httpd/error_log /var/log/httpd/modsec_*.log /var/log/mariadb/mariadb.log
Any ideas?