Open a web browser and go to iCloud.com
Sign in with your Apple ID
Click Mail
View your inbox and other folders
Open an email to read it
Use the search bar to find specific messages
Check the sidebar for sent, drafts, junk, and trash folders
Refresh the page if new mail does not appear
On iPhone or iPad, open the Mail app and make sure iCloud Mail is enabled in Settings
On Mac, open the Mail app and add your iCloud account if needed