shell:$ nslookup -timeout=2 -retry=1 'robi-com-bd.mail.protection.outlook.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	robi-com-bd.mail.protection.outlook.com
Address: 52.101.124.117
Name:	robi-com-bd.mail.protection.outlook.com
Address: 52.101.157.80
Name:	robi-com-bd.mail.protection.outlook.com
Address: 52.101.137.2
Name:	robi-com-bd.mail.protection.outlook.com
Address: 52.101.137.0
Name:	robi-com-bd.mail.protection.outlook.com
Address: 2a01:111:f403:cc09::
Name:	robi-com-bd.mail.protection.outlook.com
Address: 2a01:111:f403:cc09::1
Name:	robi-com-bd.mail.protection.outlook.com
Address: 2a01:111:f403:cc1f::4
Name:	robi-com-bd.mail.protection.outlook.com
Address: 2a01:111:f403:cc1a::8