On Mon, 26 May 2003 09:22:28 -0300 (BRT) Alan Wilter Sousa da Silva
<[EMAIL PROTECTED]> wrote:
> How can I verify if I have a misconfigured DNS?
> I mean, how can I know that I won't have e-mail reject for a such
> mechanism suggest by Pierre?
Looking at your post's headers...
> Received: from iracema.biof.ufrj.br (iracema.biof.ufrj.br
> [146.164.76.162])
1:^^^^^^^^^^^^^^^^^^^^
2:^^^^^^^^^^^^^^^^^^^^
> by chagas.biof.ufrj.br (8.12.9/8.12.9) with ESMTP id
> h4QCQ8kh009901 for <[EMAIL PROTECTED]>; Mon, 26 May 2003
> 09:26:08 -0300
This initial header shows that your server claimed to be 1 and rDNS got 2
from your IP address... so both pieces match which is good.
Conversely, the same initial Received header for missing rDNS should look
like this:
> Received: from iracema.biof.ufrj.br (unknown [146.164.76.162])
If 1 and 2 don't match, then my mailer also tries to resolve 1 (the name
you configured in your mailer). In this case, both must pass the test...
Moral of the story: make sure your rDNS is correct and your mailer sends a
known-to-DNS name in the HELO/EHLO packet, or your mail may be rejected...
HTH
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