Zoho Mail - 550 No such user here!

Zoho Mail - 550 No such user here!

Hello Team Zoho,

I have been able to send email from email account. However, upon replying to the same mail I am unable to receive email from gmail & yahoo. 

The response was:

550 No Such User Here


Final-Recipient: rfc822;  contact@aadivaahan.com
Action: failed
Status: 5.0.0
Remote-MTA: dns;  aadivaahan.com . (108.61.29.124, the server for the domain  aadivaahan.com .)
Diagnostic-Code: smtp; 550 No Such User Here
Last-Attempt-Date: Tue, 04 Jul 2017 00:32:53 -0700 (PDT)

Please help in resolving the issue at the earliest.

Regards,
Aadivaahan