In my last post I outlined how to create a list which you can use to mailmerge letters. In this post I go over creating a letter in Word 2007, using mailmerge to insert multiple addresses.  

Open Word and choose the Mailings ribbon.

Click on the button that says Start Mail Merge and select Letters. You are given an empty document.

Click on Select Recipients, and then choose Existing List. Find your Excel spreadsheet and click on Open.

Compose your letter, inserting the merge fields from the list under the button Insert Merge Field. To preview how the fields appear, click on Preview Results. This will preview just one of the records in the letter.

When you have completed your letter you can click on Finish and Merge. I always choose the first option Edit Individual Documents so that I can view and edit before I print. You can also save the letters as evidence that the letters were done, should you need proof in future.

That should save you a bit of time in future.