==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):
- Deployed with iRedMail Easy or the downloadable installer? No
- Linux/BSD distribution name and version: Ubuntu 2.4
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL (MariaDB)
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? No
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====
Hello,
I upgrade my OS Ubuntu 18.4 to 20.4.  All ok with that.  However I had problems with php7.4

In run php8.2 and php7.4  concurrently without issues before following this guide:
-> https://docs.iredmail.org/upgrade.ubunt … upgrade-os in particular "Update php-fpm related configurations"

Following the modifications in above, php7.4 would not run through Apache, got error 503. 
After a bit of time and tracking down I found the replacement file www.conf was the issue.

I reverted to the www.conf prior to following the noted iRedMail tutorial and all was fine again.

I don't use NGINX for admin and I suspect the php changes were for NGINX.
iRedMail/iRedAdmin appear to be working correctly.

I posted this issue because other may have experienced the same problem. There may be a better solution so the iRedMail www.conf is kept.

Comments appreciated.

Thank you, Greg