Is this a DNS pollution?

[Jeff Pang]

 From my home isp I can't access the daum email correctly.

I checked the DNS of imap/smtp via follows.

$ dig smtp.daum.net

; <<>> DiG 9.10.6 <<>> smtp.daum.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8473
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;smtp.daum.net.			IN	A

;; ANSWER SECTION:
smtp.daum.net.		123	IN	A	157.240.8.41

;; Query time: 19 msec
;; SERVER: 208.67.222.222#53(208.67.222.222)
;; WHEN: Wed Jul 24 09:09:28 CST 2024
;; MSG SIZE  rcvd: 47

$ dig imap.daum.net

; <<>> DiG 9.10.6 <<>> imap.daum.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8834
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;imap.daum.net.			IN	A

;; ANSWER SECTION:
imap.daum.net.		85	IN	A	108.160.163.106

;; Query time: 13 msec
;; SERVER: 208.67.222.222#53(208.67.222.222)
;; WHEN: Wed Jul 24 09:09:47 CST 2024
;; MSG SIZE  rcvd: 47



I am certain that these two IPs are not the official IPs of daum.net. 
May I ask if this situation is due to DNS pollution? The public DNS 
parser I am using is 208.67.222.222, which is a service provided by 
Cisco.

Do you know how to stop this happens?

Thanks

-- 
regards,
Jeff Pang