Email IP limit reaching

Hi,
I am facing this limit issue
dovecot: imap-login: Disconnected: Maximum number of connections from user+IP exceeded (mail_max_userip_connections=10): user=<[email protected]

I increase the limit in this file ( /etc/dovecot/conf.d/20-imap.conf )

But the increased limit is not showing in cyberpanel dashboard, and keet blocking the incoming IMAP connection request.