Exchange 2k w/SP3 on w2k member server of w/sp3 AD w/AD Integrated DNS home network. I'm having what a problem getting my exchange server to receive internet email. It was working at one point and then it just quit. I can send email internally and out to the internet without a problem. If I attempt to send mail to this server from an external account I get nothing. No reply or errors stating that the mail was undeliverable. In my DNS event logs I get the following: Event ID: 409 The DNS server list of restricted IP interfaces contain IP addresses that are not configured to use at the server computer. I connect to the DNS server which is located on a separate DC and make sure that the Interface tab contains the IP address of the DNS server and the "Only the following IP address" option selected. I then stop and restart the DNS server and the same error comes up. This is based on Q326911 Can anyone advise me on how else to troubleshoot this issue? I've already confirmed that my ISP isn't blocking port 25. I'm almost certain that it's an internal DNS issue, but I can't seem to track it down as everything appears to be set correctly. I have an mx record created for this server: mailsrvr.mydomain.com Any help is appreciated