Purchased a domain from Zoho and got all the email details.

Since accessing the web email, I am able to send emails outs to external organisations but cannot receive any emails.

Furthermore, external organisations get the following error when trying to send me an email:

This is a delivery failure notification message indicating that an email you addressed to email address :

-- vkisten@sme-scsolutions.com

 

could not be delivered. The problem appears to be :

-- Recipient email address is possibly incorrect

 

Additional information follows :

-- 550 #5.1.0 Address rejected vkisten@sme-scsolutions.com

 

This condition occurred after 1 attempt(s) to deliver over a period of 0 hour(s).

 

If you sent the email to multiple recipients, you will receive one of these messages for each one which failed delivery,  otherwise they have been sent.

 

Please help to fix as this solutions is not working for me and I have just wasted my money if not resolved.