.BDR File Extension

Contains pre-designed borders that can be applied to a Publisher document; includes multiple patterns that can be selected by the user using Publisher's BorderArt feature.

Publisher includes more than 160 borders, which are stored in 15 BDR files. They are stored in the Office\Borders folder.

Body of an e-mail non-delivery report (NDR); contains information about why an e-mail message was not delivered; includes the error code, message sender, and message recipients.

BDR files are stored in the Badmail folder along with .BAD and .BDP files.