Not being able to Receive Mail (Specifically from Gmail)

Not being able to Receive Mail (Specifically from Gmail)

I'm using email hosting from zoho with my own purchased domain (www.aspiregarments.com). I can send emails from zoho, but not receiving emails. Actually, I'm not missing all the emails, but some are going through and some are not being sent. 

From my gmail account, I sent 5 to 7 emails to my zoho account/my domain address, in a span of 5 minutes. Out of those, i received about 4 of them, and 3 of them were returned. I have attached the message I received when the email was returned. 

This is very odd, from the same gmail account, I am sending an email to the same zoho email address, it is going through sometimes, and the next minute it is bounced back. 

Please help.