Mail merge using an Excel spreadsheet - support.microsoft.com Use mail merge to create and send bulk mail, labels, and envelopes. Mail merge - A free, 10 minute, video training. Discover more Word training at LinkedIn Learning . Here are some tips to prepare your Excel spreadsheet for a mail merge. Make sure: Column names in your spreadsheet match the field names you want to insert in your mail merge. For example, to address readers by their first name ...