On 5/27/24 4:13 AM, Matus UHLAR - fantomas via Postfix-users wrote:
> 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.
I added the zen,spamhaus,org=127.0.0.[2..11 to my submission settings in
master.cf. Worked, but it blocked my AT&T mobile block. Go figure!
I changed it to 127.0.0.4 to be more specific. It turns out AT&T mobile
has numbers is in the XBL database. I tried bl.spamcop.net, and it does
nothing.
Last night I logged "81 SASL authentication failed." That's about
average. Seems I have a lot of new friends.
I'm still thankful to learn more about master.cf, I had ignored it for
the most part.
--john
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