MailMergeApp is an AppleScript Studio application that makes it amazingly simple to Create 'merged' mailings. The single greatest thing about this application is that it uses the Mac OS X Address Book as your contact list, so your mail list is already complete. When you launch the application it asks the Address Book what groups you have configured and allows you to chose them from a popup menu. It does the same with Mail.app for your 'send from' accounts.
All you have to do is type in you message, with spell check and multiple undo's of course. Insert your dynamic Tags such as name, phone number, email address, address, and click generate. MailMergeApp will then build individualized emails in Mail.app and put them in your out box for you to review. Once you're sure your mailing is complete. Click send and receive all. Now you users, friends, or Family Get a specialized email just for them - no more cold carbon copies.
It's ideal for developers who want to send customized mailings but don't need the full spam friendly power of the expensive merge programs that are available. It is available thourgh PayPal for $10 , but has a full featured demo mode that allows you to send Up to 10 customized emails at a time. Registered versions can send a an unrestricted number of merged emails per batch.