==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 
V 1.6.1 - Ive just noticed its showing there is an update to 1.8.1 which I have not done yet.
- Deployed with iRedMail Easy or the downloadable installer?
Self installed.
- Linux/BSD distribution name and version:
Ubuntu 20.04

- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
MySQL. Not sure, I think it mentioned using maria db when I last installed it.

- Web server (Apache or Nginx):
I think apache, but not sure, I seem to remember it suggested Nginx which I would have accepted.

I also installed SOGO as part of the installation. I did not install Webmail or anything else not required.

Has any successfully upgraded the OS. The last time I did this it messed up the system and I ended up installing from scratch.
This upgrade will be to 20.04.01

Many Thanks
J