==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.6.8
- Deployed with iRedMail Easy or the downloadable installer? downloadable installer
- Linux/BSD distribution name and version: Ubuntu 22.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- 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 tried to install iRedmail 1.6.8 on UBUNTU 22.04, but i got this error (unmet dependency):

Depends: gcc-12-base (= 12.1.0-1ubuntu1~22.04) but 12.3.0-2ubuntu1~22.04 is installed

gcc-12-base 12.1.0-2ubuntu1~22.04 is suppressed and no longer is supported, I tried to install it from .deb file found on launchpad site. It's done, But now there are two more unmet dependencies:

libgcc-s1 : Depends: gcc-12-base (= 12.3.0-1ubuntu1~22.04) but 12.1.0-2ubuntu1~22.04 is installed
libstdc++6 : Depends: gcc-12-base (= 12.3.0-1ubuntu1~22.04) but 12.1.0-2ubuntu1~22.04 is installed

I found libgcc-s1_12.1.0-2ubuntu1~22.04_amd64.deb on the web and downgraded it.
but "libstdc++6_12.1.0-2ubuntu1~22.04_amd64" is no where, apparently it is removed from all official package as gcc-12-base_12.1.0-1ubuntu1~22.04 is more supported.

So I think iRedmail 1.6.8 needs to work with gcc-12-base_12.3.0-2ubuntu1~22.04 version as it is the current version in Ubuntu 22.0.4

Thanks.