Running Exchange2010 SP3 UR7, have many messages sitting in the queue of type DnsConnectorDelivery 451 4.4.0 primary target ip address responded 421 4.2.1 unable to connect.
The general and recepient tab of one of the message please note mydomain=my real domain name:
Subject: Undeliverable: Re: You have a $50 CVS reward waiting for you
Internet Message ID: <firstname.lastname@example.org>
From Address: <>
Size (KB): 6
Message Source Name: DSN
Source IP: 255.255.255.255
Date Received: 12/2/2014 11:12:51 AM
Expiration Time: 12/4/2014 11:12:51 AM
Last Error: 400 4.4.7 Message delayed
Queue ID: EXCHANGE3\402697
Recipients: CVScustomerrewards@vex5powervpsnode.link;2;2;400 4.4.7 Message delayed;0;CN=Internet Mail SMTP connector Exchange3,CN=Connections,CN=Exchange Routing Group (DWBGZMFD01QNBJR),CN=Routing Groups,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=My Domain,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=mydomain,DC=com
The recipient information:
CVScustomerrewards@vex5powervpsnode.link ready 400 4.4.7 message delayed
Can someone please help me in identifying what is going on with my exchange, my antivirus is fine, filtering is fine running Sophos pure message. Is my exchange sending spam? how and where can I block it? Need help please.