If Horde Webmail don’t open correctly in Cpanel run:
/scripts/autorepair phpapps_owner_fix
as root user. It will fix the owner prmissions
which mostyl causes this problem.

It is strongly recommended to enable open_basedir protection
on shared hosting systems to prevent a complete server hack over php.
Log into WHM and look under security > security center.
The feature jails any user’s php ability inside the public_html directory

To update Cpanel/WHM to the latest version run:
~# /scripts/upcp
Depending on your configuration the latest
Edge, Release, Current or Stable version will be installed

To install PostgreSQL on a Cpanel server run:
~# /scripts/installpostgres
and follow the isntructions. You need assign a password
from the SQL section in WHM.
Recompile Apache with pgsql support.