If you need to set up a mailing list, I will suggest two choices:
- http://www.phplist.com/
An open source email campaign manager, with an hosted option
The Free account has an unlimited number of contacts, but a 300 message per month limit. - http://www.mailchimp.com
Commercial hosted solution. Very nice site, with a strong appeal. Free Up to 500 contacts, so the first seems better.