Question Anti spam using DNSBL

[JuanCar]

Server operating system version

Almalinux 9.4

Plesk version and microupdate number

Plesk Obsidian 18.0.69 #4

Hi, I set my mail config antispam to use DNSBL (bl.spamcop.net;xbl.spamhaus.org) but I think it doesn't work, I receive spam from listed IP,s.
I check IP of received spam mail in spamcop and I get it's llisted, so the filter is not working. Why? ???
Is there any log to see if the filter is working?
Thanks

 

[Kaspar]

[...]
I check IP of received spam mail in spamcop and I get it's llisted, so the filter is not working. Why? ???

Hard to say without any further information from logs, but a common issue is when DNS lookups are resolved via public DNS servers instead of locally. Review your /etc/resolv.conf file to see what names servers are configured.

Is there any log to see if the filter is working?

Yes, have a look at the mail log at /var/log/maillog

 

[JuanCar]

Thanks
resolve.conf contains public IPs as nameserver
And I have DNS service disabled
Then, does I need to active this service (Bind DNS Server) and change resolve.conf?

 

[JuanCar]

Add info: The name server contained in resolv.conf works fine, it can reach dbsbl servers.