==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.3.2
- Deployed with iRedMail Easy or the downloadable installer? Downloadable installer
- Linux/BSD distribution name and version: Ubutu
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Manage mail accounts with iRedAdmin-Pro? No
====

Hello,
I know that iRedMail by default use

zen.spamhaus.org=127.0.0.[2..11]*3
b.barracudacentral.org=127.0.0.2*2

I want to add

dbl.spamhaus.org 

And my question is in what section should I add this record ? According to this article

So new config should be

# Recipient restrictions
smtpd_recipient_restrictions =
    reject_non_fqdn_recipient
    reject_unlisted_recipient
    check_policy_service inet:127.0.0.1:7777
    permit_mynetworks
    permit_sasl_authenticated
    reject_unauth_destination
    reject_rhsbl_sender dbl.spamhaus.org
    check_policy_service inet:127.0.0.1:12340

Is it right? Or I should add

dbl.spamhaus.org

to postscreen section

postscreen_dnsbl_sites =
    zen.spamhaus.org=127.0.0.[2..11]*3
    b.barracudacentral.org=127.0.0.2*2
    dbl.spamhaus.org=127.0.1.[2..106]

Also I am not sure about  dbl.spamhaus.org=127.0.1.[2..106] in case wee need to use postscreen.