my collegue does not recevie emails. The following error appears:

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. The following address(es) failed:

  ozren@aviocats.com

    host mx.zohomail.com [165.254.167.50]

    SMTP error from remote mail server after RCPT TO:<ozren@aviocats.com>:

    552 5.1.1 <ozren@aviocats.com> Mailbox delivery failure policy error

Can you please fix this error?

Thanks

Alen