Unable to receive email

Unable to receive email

Hello , 

I have an issue in my zoho mail. I am unable to receive any mails.

The sender have informed me that it is showing 554 5.2.3 Mail Policy violation error delivering to the mail boxes and it shows that message which was sent could not be delivered to one or more of its recipients.

My email is kush@studyedge.com.au

Its very important for me. Please fix as soon as possible.

Best
Kush