News2Email Description:

News2Email is is an industrial strength, fast and reliable way to look for email addresses over the Web. Specify usenet groups of your search and the Email Spider brings you hundreds of addresses from newsgroups found by the search engine.
The tool supports public and authenticated news servers. You can define your search by yourself and as many newsgroups as You want! Another great feature of the tool is an option to search into a limited number of articles.
News2Email stores all the emails sorted and deduplicated. Build your own mailing lists with greater accuracy and faster than with other tools.