MailBoy - MailBoy 2004 is easy to use and powerful mass mailer software. It can send e-mails to thousands of recipients with a click of a button. You can organize your sender's accounts and mail lists. Built-in SMTP and DNS servers. Unlimited number of recipients. Using threads technology to send hundreds of e-mails simultaneously. Supports multiple attachments and HTML messages. Shows status while sending. Ability to save Processed, Successful, or Failed e-mails. Customizable X-Mailer header, etc.