Spamhause warning

[Ravgrg]

Hi

How I fix this issue:

[WARN] [-] [dnsbl] zone 'zen.spamhaus.org' did not respond to test point (null)
[WARN] [-] [dnsbl] disabling zone 'zen.spamhaus.org'

And I have another question: I want to configure the spam filter as effectively as possible. Could you please instruct me on the best configuration for filtering spam?

How I configure to rate limit maximum 300 per hour per sender?

So far I configured:
rspamd(Should i use SpamAssassin instead? or both?)
bounce with the following settings:

[check]
reject_all=false
single_recipient=true
empty_return_path=true
bad_rcpt=true
bounce_spf=true
non_local_msgid=true

[reject]
single_recipient=true
empty_return_path=true
bounce_spf=false
non_local_msgid=false

spf plugin to check and reject outgoing spf if not present in the DNS of the domain

Hope to get advice from experience users, I want to keep the IP reputation as much as possible good.
Thanks.

[Matt Simerson]

How I fix this issue:

By assuring your server has reliable DNS.