==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):  1.7.0
- Deployed with iRedMail Easy or the downloadable installer? Downloadables 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.
====
Hello everyone so I have enabled MySQL to listen on port 3306:
tcp        0      0 0.0.0.0:3306            0.0.0.0:*               LISTEN      5780/mariadbd

Still no connection is allowed.
UFW is disabled
Iptables config:
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:mysql

but still no luck.

When doing a port scan seems port 3306 is filtered.
Any ideas?