Recipient email servers looking for source domain entry??

[Jim Picerno]

I'm using Exchange 5.5 and I'm gettng the error messages I've listed below.
Are these errors referring to a specific DNS entry or is it some other
problem with DNS. If there is a specific DNS entry could someone provide an
example?


Event Type: Warning
Event Source: MSExchangeIMC
Event Category: SMTP Interface Events
Event ID: 4030
Description:
The following message could not be delivered to <Jane_Doe at Destination.com>
Delivery will be retried later. The  destination server reported: 450
<John_Doe at Source.com>: Sender address rejected: Domain not found From:
<John_Doe at Source.com> Subject: ABC123

Event Type: Warning
Event Source: MSExchangeIMC
Event Category: SMTP Interface Events
Event ID: 4090
Date:  3/5/2000
Time:  4:12:52 PM
Description:
Mail could not be delivered to 123.456.789.10 (Destination.org). The
destination server reported 451 <John_Doe at Source.com>... Sender domain must
resolve. Delivery will be retried later.