EBS 2008: Replacing NIC may cause inbound/outbound email queuing up

Replacing a network adapter on Essential Business Server 2008 Security Server may cause inbound and outbound email to queue and not be delivered. Confirm this by checking message queue on Security Server: Start Exchange Management Console on Security Server; Click Toolbox; Select Queue Viewer under Mail flow tools category to open Queue Viewer tool; Review […]

Replacing a network adapter on Essential Business Server 2008 Security Server may cause inbound and outbound email to queue and not be delivered. Confirm this by checking message queue on Security Server: Start Exchange Management Console on Security Server; Click Toolbox; Select Queue Viewer under Mail flow tools category to open Queue Viewer tool; Review information in Last Error column. Note whether you’ve an inbound/outbound message queue and if there’s an error similar to "451 4.4.0 DNS Query Failed". “Reconfigure Internal and External DNS Lookups settings by using Exchange Management Console. Reconfigure Internal DNS Lookups setting: Log on locally to Security Server; Open Exchange Management Console; Select Edge Transport server in Result pane, and then select Properties; Select Internal DNS Lookups tab; Select your internal Network Adapter in Use network card DNS settings drop down list and click OK.”

More info: Reconfigure External DNS Lookups setting