root@deployment-mx02:~# dig mail.beta.wmflabs.org

; <<>> DiG 9.10.3-P4-Debian <<>> mail.beta.wmflabs.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 30528
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;mail.beta.wmflabs.org.		IN	A

;; ANSWER SECTION:
mail.beta.wmflabs.org.	41	IN	A	208.80.155.138

;; Query time: 0 msec
;; SERVER: 208.80.155.118#53(208.80.155.118)
;; WHEN: Wed May 30 21:05:07 UTC 2018
;; MSG SIZE  rcvd: 55

root@deployment-mx02:~# host labs-recursor0.wikimedia.org
labs-recursor0.wikimedia.org has address 208.80.155.118
root@deployment-mx02:~# dig mail.beta.wmflabs.org @labs-recursor0.wikimedia.org

; <<>> DiG 9.10.3-P4-Debian <<>> mail.beta.wmflabs.org @labs-recursor0.wikimedia.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4391
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;mail.beta.wmflabs.org.		IN	A

;; ANSWER SECTION:
mail.beta.wmflabs.org.	3567	IN	A	10.68.23.220

;; Query time: 0 msec
;; SERVER: 208.80.155.118#53(208.80.155.118)
;; WHEN: Wed May 30 21:07:12 UTC 2018
;; MSG SIZE  rcvd: 55

root@deployment-mx02:~# dig mail.beta.wmflabs.org

; <<>> DiG 9.10.3-P4-Debian <<>> mail.beta.wmflabs.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23587
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;mail.beta.wmflabs.org.		IN	A

;; ANSWER SECTION:
mail.beta.wmflabs.org.	3562	IN	A	10.68.23.220

;; Query time: 0 msec
;; SERVER: 208.80.155.118#53(208.80.155.118)
;; WHEN: Wed May 30 21:07:17 UTC 2018
;; MSG SIZE  rcvd: 55