Ola galera, to precisando de um help de vcs, o servidor aqui da empresa onde trabalho roda um sendmail, os e-mail vão certos e tal mas começou a dar prrblema quando mando e-mail para alguem da john Deere, deem uma olhada no erro que retorna, será que possa ser meu DNS reverso o problema?

obrigado a todos

----- Original Message -----
From: "Mail Delivery Subsystem" <MAILER-DAEMON@minhaempresa.com.br>
To: <user@minhaempresa.com.br>
Sent: Tuesday, May 27, 2008 2:41 PM
Subject: Warning: could not send message for past 4 hours
> **********************************************
> ** THIS IS A WARNING MESSAGE ONLY **
> ** YOU DO NOT NEED TO RESEND YOUR MESSAGE **
> **********************************************
>
> The original message was received at Tue, 27 May 2008 10:21:45 -0300
> from [192.168.0.238]
>
> ----- Transcript of session follows -----
> user@johndeere.com... Deferred
> Warning: message still undelivered after 4 hours
> Will keep trying until message is 5 days old
>
--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
------- End of Faorwarded Message -------