shell:$ nslookup -timeout=2 -retry=1 'mail.alibaba.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	mail.alibaba.com
Address: 203.119.238.64
Name:	mail.alibaba.com
Address: 203.119.238.116
Name:	mail.alibaba.com
Address: 203.119.204.250
Name:	mail.alibaba.com
Address: 203.119.238.5