How to delete the emails ?

Solution :

[1] Access your control panel at https://www.yourdomain.com:8443 [ Example :https://www.crmcell.com:8443 ]
[2] Click on subscriptions.
[3] Click on the subscription name
[4] Go to Mail > the Mail Settings select email id for which you want to remove, by using checkboxes.
[5] Click remove
[6] Click Yes