Removing Duplicate Emails

Hello everyone.

I'm looking for a method to remove duplicate emails from a text or word documents.

I have a list of email with a few duplicates in both text and word format like so:

email@gmal.com
email@gmail.com
email2@gmail.com
email2@gmail.com
email3@gmail.com
email4@gmail.com

Currently I am putting them all in one word file and sorting it in alphabetically and removing them manually.

Is there an easier way I can remove the duplicate emails and leave just one instance of each automatically?

Thanks you

Reta

This is not Flash related, can a mod move?