On Thu, Nov 03, 2022 at 10:59:22AM -0500, Brian Knight via mailop wrote:
> I'm seeing DNS issues this morning connecting to sbl.spamhaus.org.
> 
> This morning, my Postfix server was rejecting all incoming emails as spam.
> Found that the A record for sbl.spamhaus.org is gone, replaced with SOA and
> NS records that look a bit odd.

You seem to missunderstand RBL.  The correct way to test this RBL is via
a lookup for "2.0.0.127.sbl.spamhaus.org", which is also listed in the
FAQ at https://www.spamhaus.org/faq/section/DNSBL%20Usage.

> Queries direct to the NS servers return the same result. Queries via AWS and
> Comcast return the same result also.

And you always need your own DNS recursor to query RBL.

Bastian

-- 
Vulcans do not approve of violence.
                -- Spock, "Journey to Babel", stardate 3842.4
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