shell:$ nslookup -timeout=2 -retry=1 'mail.cert.sd'
;; communications error to 75.98.161.224#53: timed out
Server:		69.39.86.5
Address:	69.39.86.5#53

Non-authoritative answer:
mail.cert.sd	canonical name = cert.sd.
Name:	cert.sd
Address: 103.8.25.36