Which version of Exchange?

----- Original Message ----- 
From: <[EMAIL PROTECTED]>
To: "Exchange Discussions" <[EMAIL PROTECTED]>
Sent: Friday, March 01, 2002 11:23 AM
Subject: SMTP Question


> Hi,
> Our Unix folks are trying to send mail via our Exchange IMC box. Their
> machine is
> allow to relay in the IMC routing configuration. In tests the mail fails
> delivery with
> an error message "553 5.1.8 Domain of sender address does not exist. The
> From address
> of the email has the FQDN of the server. I believe it fails because any
> reverse lookups
> will be unable to resolve the domain name in the From address. Do I
> understand this
> correctly? Just trying to do my homework.
> 
> Mort Billups
> Crowley Maritime Corporation
> 
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