Problema ao entregar o e-mail - retorno ao remetente / Undelivered Mail Returned to Sender

[Mail Delivery System]

*** ENGLISH MESSAGE BELOW ***

Mensagem do serviço de email no servidor a2-starfury17.uol.com.br

Lamentamos informar que não foi possível 
entregar sua mensagem para um ou mais destinatários. 


---------------------------------------------------------
This is the mail system at host a2-starfury17.uol.com.br.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

    The mail system
	

<dantoncorrea at uol.com.br>: host mfuol.mail.sys.intranet[10.129.135.37] said:
    550 RCPT TO:<dantoncorrea at uol.com.br> User unknown (in reply to RCPT TO
    command)
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