On the Tools menu, point to Letters and Mailings, and then click Envelopes and Labels.
Click the Envelopes or Labels tab.
If necessary, enter or edit the delivery and return addresses.
Select the Add electronic postage check box.
If you do not have an electronic postage program installed, Microsoft Word prompts you to install one and offers to connect to the Microsoft Office Online Web site. There you can get more information and links to other sites that offer electronic postage.
To set options for the electronic postage programs that are installed on your computer, click E-postage Properties.
Tip
You can use the Mail Merge task pane to add electronic postage during a mail merge.