How to check if pop3d or imap connection limit is reached

[a24uall]

root@server [~]# grep Maximum /var/log/maillog*
/var/log/maillog.1:Dec 18 03:20:22 myserver pop3d: Maximum connection limit reached for ::ffff:281.39.90.24
/var/log/maillog.1:Dec 18 03:20:22 myserver pop3d: Maximum connection limit reached for ::ffff:281.39.90.24
/var/log/maillog.1:Dec 18 03:20:22 myserver pop3d: Maximum connection limit reached for ::ffff:281.39.90.24