Query hoyoverse.com MX, but getting CNAME

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Frankie Thum

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Apr 9, 2024, 9:52:42 AMApr 9
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Domain hoyoverse.com contains "CNAME flattening" config. This is causing issue to Google DNS' resolution.
Google DNS resolution of MX for hoyoverse.com is getting alternating/rotating answers, between MX and CNAME.    The CNAME answer is wrong.  Google DNS should only give MX answer.


======================================================================

$ dig mx hoyoverse.com @8.8.8.8

; <<>> DiG 9.10.6 <<>> mx hoyoverse.com @8.8.8.8

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61656

;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1


;; OPT PSEUDOSECTION:

; EDNS: version: 0, flags:; udp: 512

;; QUESTION SECTION:

;hoyoverse.com. IN MX


;; ANSWER SECTION:

hoyoverse.com. 83 IN CNAME alb-www-hoyoverse-2122947210.ap-southeast-1.elb.amazonaws.com.


;; AUTHORITY SECTION:

ap-southeast-1.elb.amazonaws.com. 48 IN SOA ns-1125.awsdns-12.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 60


;; Query time: 14 msec

;; SERVER: 8.8.8.8#53(8.8.8.8)

;; WHEN: Tue Apr 09 13:57:36 +08 2024

;; MSG SIZE  rcvd: 196


======================================================================


$ dig mx hoyoverse.com @8.8.8.8


; <<>> DiG 9.10.6 <<>> mx hoyoverse.com @8.8.8.8

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16460

;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1


;; OPT PSEUDOSECTION:

; EDNS: version: 0, flags:; udp: 512

;; QUESTION SECTION:

;hoyoverse.com. IN MX


;; ANSWER SECTION:

hoyoverse.com. 3600 IN MX 5 hoyoverse-com.mail.protection.outlook.com.


;; Query time: 15 msec

;; SERVER: 8.8.8.8#53(8.8.8.8)

;; WHEN: Tue Apr 09 13:57:41 +08 2024

;; MSG SIZE  rcvd: 96


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