==== 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,
Some of emails which are listed on zen.spamhaus.org or barracudacentral.org accepted by postscreen.

I am pretty sure that my postscreen works, because of log from my server

Dec  3 10:02:29 mail postfix/dnsblog[54351]: addr 141.98.10.192 listed by domain zen.spamhaus.org as 127.0.0.4
Dec  3 10:02:29 mail postfix/dnsblog[54351]: addr 141.98.10.192 listed by domain zen.spamhaus.org as 127.0.0.2
Dec  3 10:03:00 mail postfix/dnsblog[54350]: addr 45.125.65.39 listed by domain zen.spamhaus.org as 127.0.0.4
Dec  3 10:03:02 mail postfix/dnsblog[54350]: addr 103.253.42.54 listed by domain zen.spamhaus.org as 127.0.0.4

In my infrastructure we use Mikrotik with DNS cache function. Allowed cache size is 4 Mb, used cache size approximately 1.1 Mb.

I think the problem is either Mikrotik DNS or upstream DNS. To investigate this I want to check postscreen log especially all DNS replies and answers. Is it possible to enable such kind of log ?