==== Required information ====
- iRedMail version: 0.9.2
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): PGSQL
- Web server (Apache or Nginx): Apache
- Linux/BSD distribution name and version: CentOS 7
- Related log if you're reporting an issue:
====
Is there any guide on how to install SOGo after installing iredmail with PostgreSQL backend on CentOS 6/7 ?