Undelivered Mail Returned to Sender

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                   The mail system

<jntslvdrt@bol.com.br>: host mx3.bol.com.br[200.147.36.13] said: 450 4.7.1
    Client host rejected: cannot find your hostname, [162.243.162.72] (in reply
    to RCPT TO command)
Reporting-MTA: dns; z.lalande.com.br
X-Postfix-Queue-ID: 7F57C4331D
X-Postfix-Sender: rfc822; contato@lalande.com.br
Arrival-Date: Wed, 15 Oct 2014 11:30:21 -0300 (BRT)

Final-Recipient: rfc822; jntslvdrt@bol.com.br
Original-Recipient: rfc822;jntslvdrt@bol.com.br
Action: failed
Status: 4.7.1
Remote-MTA: dns; mx3.bol.com.br
Diagnostic-Code: smtp; 450 4.7.1 Client host rejected: cannot find your
    hostname, [162.243.162.72]
Assunto	Teste
De	contato@lalande.com.br
Para	jntslvdrt@bol.com.br
Data	2014-10-15 11:30