Tektune Mail Sender can send emails to several people at once, enable you to easily send mail messages to several contacts in the same time. You can save your e-mail lists to text files so you can easily load them into the program.
Limitations:
* you can send maximum 50 mails
* the connection settings are saved only for the current session

The license of this software is Free Trial Software, the price is $24.95, you can free download and get a free trial.