==== Required information ====
- iRedMail version (check /etc/iredmail-release):
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- Related log if you're reporting an issue:
====

Hello,

After some system updates, my iRedmail working setup has had some major issues.

A system admin upgraded the 14.04 Ubuntu to 16.04, and now some of the iredmail components are not working.

/iredadmin still logs in, and the MySql DB is still instact from what I can see.

/mail  (roundcube) is not accessible, I get an HTTP 500 server error, roundcube still exists in opt/www/ so I think I am missing some config changes to get it back?

Lastly and most importantly, mail clients have stopped connecting to the server (IMAP/SMTP)

Any help is appreciated