POP3 stands for Post Office Protocol, a way in which you receive mail on the internet, paralleling how mail is received in your mailbox. To set up your POP3 for Outlook, go to tools, click ‚Äúview or change existing e-mail accounts‚Äô and press next. You‚Äôll be able to see a list of your current email accounts that you can change or remove. When you select an email and press change, you‚Äôll be able to see the account in detail: the email address, the POP3 and SMTP server information, and the username displayed to viewers. When you click next, you‚Äôll be back to your list of email accounts. You can list one of your emails as the default where when you send an email from Outlook, that will be the email that is automatically used.