Not receiving emails all of sudden and getting

Not receiving emails all of sudden and getting

I am meeting the following - Recipient address rejected: User unknown in virtual mailbox table'

When i try to send emails from Hotmail, as my Zoho Email account hasnt received emails in over 2 weeks:

The address you sent your message to wasn't found at the destination domain. It might be misspelled or it might not exist. Try to fix the problem by doing one or more of the following:

  1. Send the message again, but before you do, delete and retype the address. If your email program automatically suggests an address to use, don't select it.
  2. Clear the recipient AutoComplete cache in your email program by following the steps in this article: Status code 5.1.1. Then resend the message, but before you do, be sure to delete and retype the address.
  3. Contact the recipient by some other means (by phone, for example) to confirm you're using the right address. Ask them if they've set up an email forwarding rule that could be forwarding your message to an incorrect address.
Recipient address rejected: User unknown in virtual mailbox table'