Select contacts, in other words highlight all those contacts you would like the messgae to go to, then go to TOOLs, mail merge and follow instructions. Select merge to email. Mail merge opens Word for you, document behaves like a Word doc. You can insert as many merge fields as you like.
My tip: Work offline first, because once you select "merge to mail" Word puts all those merged messages into your Outlook outbox. Good idea also to send a copy of your merged letter/mail to yourself so you can see the real thing
Each receipient will receive a personalised mail from you, without knowing that you've sent it to many others.
Best select plain text option as not all receivers might be able to receive HTML.
Gloria