title: I am needing to drop some rows based on email address?
body: <p>so I have a dataframe with some email addreses but I need to keep only corporate domain email address and discard the ones engind in gmail, hotmail, or yahoo.com</p>
  <p>how can I do this?</p>
  <pre><code>dffinal['email']
  
  4                  corporate@rocketbank.com.br
  6                personal@gmail.com
  7                    personal@gmail.com
  9                 corporate@santander.com.br
  11                corporate@revelo.fr
  13          corporate@valemobi.com.br
  </code></pre>
  <p>I need to drop all results with personal emails and keep corporate ones.
  thank you in advance</p>