Login to CWP with login id and password with link http://serverip:2030
Search options Email -> Add Email Accounts
- Click on Add a New MailBox button
- You can choose your domain and password (CWP automatically generates a password for you)
and at the end, click on create mailbox.
The new email account will be created and you can see it in the list
You can access emails in roundcube webmail client at http://your ip:2030/roundcube link