1. Login to cPanel account.
2. Go to the Email section and click on Email account.
3.Click on Create option.
4. Enter the Email and Password which you want.
5. Select Mailbox Quota as per hosting plan.
6. Then click on Create option.
7. To login to Webmail, click on Check Email option.
8. Then select Webmail interfaces which you want.
9. Roundcube webmail interface:
10. Horde webmail interface: