Power Email Extracter for Mac

From Niagara Software:

Power Email Extracter automates removing massive amounts of email addresses, from large text files and directories.
For example, a mailbox from an email program saved to disk as a text file, can be accessed by Power Email Extracter resulting with all the emails contained in that file, sorted and displayed in a list box. Duplicates can be removed with a quick keyboard short cut or from selecting from the menu. Existing text lists can be imported into Power Email Extracter, to be sorted or incorporated into larger lists. Once satisfied with the email list makeup, it can be saved as a text file to be imported to a Database or email list server. It's an indispensable tool for building up personal, business, or educational mailing lists.