Newsletter/mailing list software?

Hi doesn anyone have any recommedations for software to manage a mailing list / newsletter like the Blitz newsletter?

To make it like the Blitz newsletter I recommend this: Blitz Newsletter

Indiepath will be announcing Indie Game Business (IGB) in the new year. The service will included full mailing list and newsletter management. The process of collecting subscribers through a form on your website is automated, The unsubscribe process is automated. Advanced subscriber management: browse feature, search feature, list of people that unsubscribed, full site customisation, bounce handling and archiving of newsletters.

If you can wait a few days then I can show you a demo in the new year.