VU Mass Mailer sends mass mail smartly. There is a time interval that separates each email from being treated as mass mailing. Emails are stored in a database provided. You can add, delete, and unsubscribe emails from your list. Password protected. Great E-COMMERCE tool for anyone.
Requirements: web server (i.e. your hosted website) that supports ASP, CDONTS, MS Access (common features on any web server).