Find if mail server existsPosted: December 17, 2016
You may experience a situation where you use nslookup to find out address of a domain, but it returns no results. Still you know that the person is actually using an email account with that domain. So how do you find it out?
Just specify explicitly that it is the mail exchanger record (MX) you are interested in:
nslookup -type=mx yahoo.com