Email cannot be delivered: it did not bounce back nor did it reach the recipient.
Domain does not have MX record:
>nslookup mx vbmahospedagemwindows.com.br
*** UnKnown can't find mx: No response from server
Not properly configured MX records for the domain. Most likely they point to some foreign server.
Configure MX records on the server where main DNS zone for the server is hosted.