title: How to use nslookup command to check email domains in linux
body: <p>How to use <code>nslookup</code> command to check email domains in fedora Linux?
  I used the following command in terminal:</p>
  
  <pre><code>nslookup -query=mx com3263@dcs.ruh.ac.lk
  </code></pre>
  
  <p>This is not working for me. What's the correct command?</p>