Firstly, set up an @icloud.com email address for your iCloud account on a device. If you have Microsoft Outlook 2007 or later installed on your PC, you should open iCloud, select Mail, Contacts, Calendars, and Tasks, then click Apply. Your iCloud Mail account is listed in the folder panel (also called the navigation panel) on the left side of Microsoft Outlook. To view your iCloud Mail folders in Outlook, click the triangle to the left of your iCloud email account.
If Microsoft Outlook 2007 or later is not installed, the Mail, Contacts, Calendars, and Tasks options won't appear in iCloud for Windows. Use your web browser to access iCloud Mail at https://www.icloud.com/.