rDNS test

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From: J <japhyrider2005@xxxxxxxxx>
Date: Wed, 26 Mar 2008 09:59:37 -0700 (PDT)

Hello,
I have an Exchange 2003 server. A host company collects our email
then I download it to the Exchange server.
One client cannot send us email. They recently changed ISPs. They do
not have an rDNS record setup.
I suspect that our host requires a rDNS, but when I asked their tech,
he says no. Is there a test I can run to see if our host requires a
rDNS? (I don't trust what the tech said!)
TIA
.

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Re: rDNS test
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