Webmail login error: Your Internet Address has changed

While accessing webmail you get following errors.

Error:  Your Internet Address has changed since the beginning of your Mail
session. To protect your security, you must login again.

Solution:

Turn off the ‘checkip’ variable in the following configuration file.
The configuration files absolute path is :

/usr/local/cpanel/base/horde/config/conf.php

Thats it.