I tested the mx record and this is what I got:
smtp:69.199.57.100 smtp
220 sis.onyxarchitects.com Microsoft ESMTP MAIL Service, Version: 6.0.3790.4675 ready at Tue, 30 Nov 2010 04:57:13 -0800
Not an open relay.
0 seconds - Good on Connection time
5.507 seconds - Warning on Transaction time
OK - 69.199.57.100 resolves to mail.onyxarchitects.com
OK - Reverse DNS matches SMTP Banner
Session Transcript:
HELO please-read-policy.mxtoolbox.com
250 sis.onyxarchitects.com Hello [64.20.227.133] [47 ms]
MAIL FROM: <supertool@mxtoolbox.com>
250 2.1.0 supertool@mxtoolbox.com....Sender OK [250 ms]
RCPT TO: <test@example.com>
550 5.7.1 Unable to relay for test@example.com [5054 ms]
QUIT
221 2.0.0 sis.onyxarchitects.com Service closing transmission channel [47 ms]
I tested from several locations and they all say it is working but it is not working. Mail is sitting in the queue. The exchange troubleshooting assistant is telling me there is an error of Delivery status notification code 4.3.1 I have not been able to fix it. Any help would be appreciated. 2k3 server sp2 running on win 2k3 enterp. server sp2. Was working fine until the network card went bad and I changed it.
I found a microsoft article (http://support.microsoft.com/kb/284204) that describes the error code but it might not be related because it talks about disk space. Here's the short version:
Numeric Code: 4.3.1
Possible Cause: This code may be caused by resource problem such as a disk full condition. This code may also occur if your Simple Mail Transfer Protocol (SMTP) queue is on a File Allocation Table (FAT) partition and the service has reached a Windows-imposed limit on the number of concurrent file handles that can be opened by the SMTP Service. In this case, instead of receiving a disk full error, you might be receiving an out of memory error.
Troubleshooting: Make sure you have sufficient disk storage, and try to operate your Exchange Transport queues on an NTFS partition.
Take a look at the artice and let me know what you think.
msincorp