==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.6.3 MARIADB edition.
- Deployed with iRedMail Easy or the downloadable installer? downloadable installer
- Linux/BSD distribution name and version: AlmaLinux release 9.3 (Shamrock Pampas Cat)
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? Yes
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

I have many domains marked as disabled, but several of them are still sending internal emails. I ran some tests in Roundcube, email clients (e.g., Thunderbird), and using telnet with authentication, but these tests worked correctly and the message was not sent