==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.3.1
- Deployed with iRedMail Easy or the downloadable installer? Installer
- Linux/BSD distribution name and version: Ubuntu server 20.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): 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.
====
Dear Sirs, Dear Mr Huangbin,
I am trying to manage the dnsbl lists and I found that there is already two of them in the main.cf I copied the related lines below:
/etc/postfix/main.cf
postscreen_dnsbl_sites =
    zen.spamhaus.org=127.0.0.[2..11]*3
    b.barracudacentral.org=127.0.0.2*2

My question is: what is necessary to do in order to manage these lists? It is just to add more or to change the related lines in the main.cf and to restart postfix then or need more work possibly using the iRedAPD or involving SQL injections?

Thanks and Best Regards,
Mike Kranidis