==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.0
- Deployed with iRedMail Easy or the downloadable installer? installer
- Linux/BSD distribution name and version: Ubuntu 18.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL/MariaDB
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? No
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

I am constantly encountering problems with my mail server's performance, and as I am still running an old version (update attempt failed) on an old Ubuntu 18.04 (Ubuntu update failed, too) - I'd like to "start anew".

What do I mean by "failed"? Some time ago, I tried to update Ubuntu, but this damaged my iRedmail, so I returned to an earlier snapshot (my server is a VM) and did not dare this again yet.

What do I want to do? I'd like to set up a new Ubuntu and a new iRedMail - and then migrate my existing domains (3) including all the mailboxes and data to this new server.

Is this possible? How would I do that? Thanks in advance for any hints, tips or even how-to-s.