Microsoft provides free facility to create replica copy of any usable information through NTBackup utility. By NTBackup you can create BKF files for any emails, files, documents, PST files, PPT, HTML, Audio, Video, Software, Picture, and Snaps etc. However, Microsoft does not provide any way if your backup data has damaged.
If you require a stellar solution for Backup Emails Restore then, you can pick out BKF Repair Software which is fully loaded with latest repairing technique. You can select single scanning option from Quick, Deep or Partial Data recovery. Restore Corrupt Emails will prove favorable because using it you can get back emails beside other usable information which support .bkf files extension.