I am Getting No such user here Error Bouce Back Message

1. Check whether the Email ID is present
2. Check whether the domain is present
3. If the domain is present in our server and MX record is pointing to any other server, make sure that you are creating the Email ID in the server where the MX records are pointed
4. Aso select remote mail Exchanger in the DNS zone of our server by,

a. Login to the WHM
b. Click on Edit DNS Zone under DNS Function option.
c. Select the Domain name and click on Edit.
d. Choose Remote Mail Exchanger under Email Routing for option and check it.