mailMaker is a program which will allow you to construct, edit, save and send copies of an e-mail to multiple recepients.

With mailMaker you can set up a list of recipients using the OS X Address Book, or by typing in the addresses, add attachments (drag and drop or from file dialog boxes), add a subject line, and then add your main text. Then, with one simple click of a mouse, send your e-mails to your default e-mail application for 'personalisation' and mailing (mailMaker currently supports Apple Mail, Eudora, Microsoft Entourage and Mailsmith). It should be noted that mailMaker is not suitable for sending spam as e-mails are sent through standard OS X e-mail programs.