On Mon, 10 Apr 2023, tom--- via Postfix-users wrote:
I have two debian boxes, one is running unbound for dns resolver, another is
running systemd-resolve.
[..]
Checking for RBL on first node is successful:
[..]
But second is not:
[..]
Can you tell me why?
unbound will, per default, resolve recursively, rather than forwarding the
request to another resolver. systemd-resolve is not a recursive resolver (AFAIK
anyway).
Spamhaus blocks requests received from public resolvers (1.1.1.1, 8.8.8.8,
etc.), which is one of the reasons for preferring/requiring a real/recursive
resolver in a server, as Viktor has written already -- and please read, and
re-read, everything he ever writes or has ever written in this list, as each
message is a gem in itself :)
Cheers.
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