> postscreen_dnsbl_sites = zen.spamhaus.org=127.0.0.[2..11]
John Hill via Postfix-users:
Is this the same thing?
On 25.05.24 15:54, Wietse Venema via Postfix-users wrote:
See https://www.spamhaus.org/faqs/dnsbl-usage/#200 for a table
with the purpose of different lookup results.
To block xbl listed clients with postscreen, one would configure
xbl.spamhaus.org or zen.spamhaus.org=127.0.0.4
While they are the same, I recommend using the latter, so you can benefit
from caching DNS results in case the same source IP connects to smtp and
submission/submissions(=smtps) services.
--
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