Good morning,
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.
Queries direct to the NS servers return the same result. Queries via AWS
and Comcast return the same result also.
I removed the sbl.spamhaus.org config from Postfix config and email is
flowing again.
I've sent Spamhaus a note through their website.
---
ubuntu@mail:/etc/postfix$ dig @a.gns.spamhaus.org sbl.spamhaus.org any
; <<>> DiG 9.10.3-P4-Ubuntu <<>> @a.gns.spamhaus.org sbl.spamhaus.org
any
; (6 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35933
;; flags: qr aa rd; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 2048
;; QUESTION SECTION:
;sbl.spamhaus.org. IN ANY
;; ANSWER SECTION:
sbl.spamhaus.org. 900 IN SOA need.to.know.only.
hostmaster.spamhaus.org. 2211031543 3600 600 432000 10
sbl.spamhaus.org. 3600 IN NS e.gns.spamhaus.org.
sbl.spamhaus.org. 3600 IN NS a.gns.spamhaus.org.
sbl.spamhaus.org. 3600 IN NS b.gns.spamhaus.org.
sbl.spamhaus.org. 3600 IN NS c.gns.spamhaus.org.
sbl.spamhaus.org. 3600 IN NS d.gns.spamhaus.org.
;; Query time: 12 msec
;; SERVER:
2610:80:4:7:ca62:39bb:d7:f314#53(2610:80:4:7:ca62:39bb:d7:f314)
;; WHEN: Thu Nov 03 10:44:30 CDT 2022
;; MSG SIZE rcvd: 193
---
-Brian
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