AkeeSoft WMViewer - Version 1.0 AkeeSoft WMViewer is a GUI utility to dealing with the winmail.dat file (TNEF message), it can extract the winmail.dat, view mail body and save any attachments. It support Windows 9x, Windows 2000, Windows XP, Windows 2003.WMViewer is eady to use. To use, just open WMViewer.exe, drag/drop a WINMAIL.DAT file onto it to retrieve the mail body and attachments.