Send Messages Personally is a handy add-in for Microsoft Outlook that enables you to send a message to multiple users without putting all the addresses in the To field. If you need to send a newsletter to multiple customers and you do not want to create more than one message, this add-in can help you.

You just need to create a single message and put all the addresses in the To field. The add-in will create a individual message for each address and send them as a personal email.