Problems with SMTP.
Hello, I'm having some problems that i will list below: 1) Problema de comunicao SMTP com o servidor de email do destinatrio. Contate o administrador de sistema.("Problem of SMTP comunication with the destination mail server. Contac the your sistem adminitrator.") <-- I translate this <xxx.xxxx.com.br #5.5.0 smtp;551 You should have a reverse DNS name to you IP - See http://www.dnsstuff.com/tools/ptr.ch?ip=yyy.yyy.yyy.yyy> 2) This is an automatically generated Delivery Status Notification. THIS IS A WARNING MESSAGE ONLY. YOU DO NOT NEED TO RESEND YOUR MESSAGE. Delivery to the following recipients has been delayed. None have any ideia of how help me out? Ty, Humberto
February 27th, 2008 3:59pm

You need to create a reverse lookup record (PTR) in DNS for your outbound mail server. The server on the receiving end is doing a reverse lookup on the IP address of your mail server and isn't finding it.
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February 29th, 2008 12:28am

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