Wierd DNS requests

I have a bare metal NethServer 7 Beta2 “Bruschetta” installation ( fully updated) behind a firewall, and i spotted a dozen dns requests (53 port UDP) out of my network (mostly located in US computers - i`m in eastern europe). ldap, mail server, roundcube, pop3 and firewall are installed. how to find why, how to fix that ?
sorry for my bad english - Best Regards !

Could you check the DNS settings under the Network page?

By default DNS requests are sent to and

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I thought the spam filter had a bunch of hardcoded dns lookups?
Here’s a 6.8 install just today, and it’s got a local gateway for dns.


You are right, we have DNS black lists against mail spam!



wow, thank you :slight_smile: