How do I... Add my existing Gmail account to Windows Mail?

You'll then see the Internet Mail Logon page where you're prompted to enter your account name and password. You'll notice that the wizard will automatically provide the first part of your Gmail address in the E-mail Username text box. However, you will need to provide your full e-mail address in this text box in order for Windows Mail to properly access the Gmail server. You'll then type in your password, which will be masked, and the select the Remember Password check box.