dMailer for Windows   
by NehuenMultimedia - Marcelo Fassardi   

DMailer is a free two-in-one newsletter software: A bulk email software and also an e-mail address validator.
It's perfect for individuals or businesses sending out customized e-mail messages to their customers, newsletters, business notices, Internet marketing, CRM and other essential information. DMailer keeps your customers up-to-date with the click of a button.
As a bonus, it also detects many of the common bad email addresses that exist on many mailing lists, providing a detailed log of the entire delivering process and reporting any kind of error - It can even determine up to 90% of "dead" e-mails in the address lists before sending, providing detailed and handy logs for each email sent.