DNS Errors Occurred (Reverse DNS) even if PTR is shown by "host" command

[The Emperor]

Ticket: 93574906

.

Following problem applies to ALL accounts under WHM, even if server's main IP is resolved as reversed.
Although no problem with AutoSSL.

My Provider has already set IP to resolve to the hostname I use, in case it helps.

Nevertheless, by host command, seems that Main IP does look like it has rDNS with no problem.

host 185.4.xxx.xxx
xxxx.xxx.4.185.in-addr.arpa domain name pointer my.hostname.com.

Every cPanel account



WHM > Email » Email Deliverability



Further information

dig txt default._domainkey.my.hostname.com.

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-16.P2.el7_8.6 <<>> txt default._domainkey.my.hostname.com.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10537
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;default._domainkey.my.hostname.com. IN TXT

;; ANSWER SECTION:
default._domainkey.my.hostname.com. 14399 IN TXT "v=DKIM1; k=rsa; p=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx;"

;; Query time: 89 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sun Aug 09 23:59:01 EEST 2020
;; MSG SIZE  rcvd: 494

dig -x 185.4.xxx.xxx

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-16.P2.el7_8.6 <<>> -x 185.4.xxx.xxx
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3616
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;xxx.xxx.4.185.in-addr.arpa.    IN      PTR

;; ANSWER SECTION:
xxx.xxx.4.185.in-addr.arpa. 21599 IN    PTR     my.hostname.com.

;; Query time: 54 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Aug 10 00:09:18 EEST 2020
;; MSG SIZE  rcvd: 90
[/code[

[CODE]
for i in {a..m}; do echo -n "$i.root-servers.net: "; dig -4 "$i".root-servers.net @"$i".root-servers.net +short;done
a.root-servers.net: 198.41.0.4
b.root-servers.net: 199.9.14.201
c.root-servers.net: 192.33.4.12
d.root-servers.net: 199.7.91.13
e.root-servers.net: 192.203.230.10
f.root-servers.net: 192.5.5.241
g.root-servers.net: 192.112.36.4
h.root-servers.net: 198.97.190.53
i.root-servers.net: 192.36.148.17
j.root-servers.net: 192.58.128.30
k.root-servers.net: 193.0.14.129
l.root-servers.net: 199.7.83.42
m.root-servers.net: 202.12.27.33

nslookup 185.4.xxx.xxx

Name:    my.hostname.com
Address:  185.4.xxx.xxx

 

[cPanelLauren]

It looks like this is being handled in the ticket you opened which was escalated to our level 2 analysts as the analysts working on it previously were unable to replicate the issue you're experiencing.