To use IMP you first need following services configured:

Apache

If Apache is not enabled, enable and start Apache by either using the kcontrol module or by doing:

MySQL

If it is not enabled, enable and start mysql by either using the kcontrol module or by doing:

IMAP

IMP also requires IMAP to be available from localhost. Either enable the imap service from the kcontrol, or by doing:

IMP / MySQL configuration

IMP needs you to run a configuration script before it will operate properly. This script will create MySQL tables to be used for session information. If you want to use another database, you will need to change the configuration of phplib, horde and imp. To set up MySQL, run as root:
	/usr/libexec/horde/horde.setup

Enable IMP/Horde in Apache configuration

The last step, which will also replace this page by the Horde frontend, is to enable Horde in the /etc/httpd/mod_php4_horde.conf, by doing:
You should then be able to access Horde.