Free E-Mail Newsletter Tool for Windows and MacOSX. PostNewsletter is mass e-mailer. It sends personalized html-based E-Mails to a huge amount of recipients. This is done via smtp.
Give PostNewsletter a try to see just how useful it can be for you!

Limitations:
* You may send up to 20 e-mails newsletter with the unregistered copy

The license of this software is Free Trial Software, the price is EUR40.00, you can free download and get a free trial.