Using email class for large distributions

[eluser]wiredesignz[/eluser]
Take a look at phplist if you intend to do this yourself.

http://www.phplist.com/

phplist is an open-source newsletter manager. phplist is free to download, install and use, and is easy to integrate with any website.

phplist is designed to manage mailing lists with hundreds of thousands of subscribers. phplist is excellent with smaller lists too!