From: PauAmma (pauammagundo.com)
Date: Thu Jan 04 2007 - 13:29:50 CST

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On Thu, 4 Jan 2007, René van den Berg wrote:

> When sending mail to zonnet.nl I get the following message back from them,
> the supportgroup there is not very helpfull so I am trying to get more
> background info. My email is sent through a shared server which has a rDNS
> entry. Also my domain has a rDNS entry. So what are they checking that this
> message is generated?

What IP address are you sending email from?

> ++++++++++++++++++++++++++++++++++
>
> This message was created automatically by mail delivery software.
>
> A message that you sent could not be delivered to one or more of its
> recipients. This is a permanent error. The following address(es) failed:
>
> usernamezonnet.nl
> (ultimately generated from username
> <usernamet>domain.com<usernamedomain.com>
> )
> SMTP error from remote mail server after RCPT TO:<usernamezonnet.nl>:
> host mail4.zonnet.nl [62.58.50.87]: 553 We do not accept mail from IP
> addresses
> without reverse DNS. See http://wikipedia.org/wiki/reverse_dns
>
> ++++++++++++++++++++++++++++++++++++++

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