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554 5.7.1 Unable to verify sender address

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554 5.7.1 Unable to verify sender address - 6.Oct.2005 11:20:39 AM   
haselnutt

 

Posts: 1
Joined: 6.Oct.2005
Status: offline
We are receiving the following message when we send to austinchemical.com.  I get the same message even if the email address is invalid.  It seems like the delivery is failing way before it leaves my exchange box.  I've seen other posts like this but they deal with relaying which doesn't seem to be our problem.  I've done DNS lookups on our domain and the domain in question and that stuff checks out.  I've flushed the DNS cache on my exchange box and domain controllers.  Any ideas what would generate this error?  I can send and receive mail everywhere but the domain in question.
 
Your message did not reach some or all of the intended recipients.
Subject: test
Sent: Oct/06/2005 10:46 AM
The following recipient(s) could not be reached:
'test@austinchemical.com' on Oct/06/2005 10:46 AM
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<mail.domain.com #5.7.1 smtp;554 5.7.1 Unable to verify sender address.>


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