Windows Mail isn't included in this version of Windows. To use e‑mail, you'll need to install an e‑mail program from Microsoft or another company. You can also use a web-based e‑mail service, although you won't be able to open your old messages from Windows Mail in web e‑mail.
If you used Windows Mail before upgrading to this version of Windows, all your e‑mail, contacts, and messages are saved. Nothing is deleted during the upgrade process, so you can import your old messages and contacts into a compatible e‑mail program.