No longer recieving emails to Zoho.com

I recently noticed my email address changed to zohomail.com instead of zoho.com.

I am now no longer receiving emails to my old zoho.com email address and get the following return email error.

Could you look in to this please as I am now no longer receiving emails.

Error message below.

"This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error.

ERROR CODE :550 -
550 5.0.0 Invalid Recipient