When we send email to certain email addresses we receive the following undeliverableerror: Reporting-MTA: dns;ppimail1.us.palpro.comReceived-From-MTA: dns;ppi-2k.us.palpro.comArrival-Date: Fri, 29 Feb 2008 17:53:53 +0000 Final-Recipient: rfc822;News@LagunaBeachRACES.orgAction: failedStatus: 5.0.0Diagnostic-Code: smtp;559 we do not accept spamRemote-MTA: dns;[72.1.173.2] Any ideas??

are you guys listed on any blacklists?http://www.spamhaus.org/

we are not on the list. this all started when i introduced Exchange 2007 into our 2003 environment.

from PSS John, You are absolutely right. Symptoms of this include not being able to create mailboxes or create public stores or update email policy and results in an error The Exchange server address list service failed to respond. This could be because of an address list or email address policy configuration error. we found this to be a Leap Year bug and if we reset the date to either 28th Feb or 1st March it works. We strongly recommend not to change the system time to work around the issue as this may cause undesirable results I shall update as soon as we have some kind of solution to this.