Frequently Asked questions about TNEF ===================================== Q1. I ran TNEF on my winmail.dat file and 'nothing happened'. Why not? A1. The ms-tnef file may not contain any files. TNEF only unpacks embedded files. It ignores all other data such as RTF markup and email meta-data in the ms-tnef format. Compare the output of tnef --debug --verbose <file> with: setting alloc_limit to: 0 TNEF Key: c02 TNEF Version [type: dword] [len: 4] = 00010000 OEM Codepage [type: byte] [len: 8] = e4 04 00 00 00 00 00 00 Message Class [type: word] [len: 24] = 5049 5049 5049... Message ID [type: string] [len: 33] ='4C8701152E82D311A7A50008C71BCA8D' Date Modified [type: date] [len: 14] = Thu 1999/10/14 08:52:42 Date Sent [type: date] [len: 14] = Thu 1999/10/14 08:55:44 Subject [type: string] [len: 1] ='' Priority [type: short] [len: 2] = 1 MAPI Properties [type: byte] [len: 2240] = 46 00 00 00 03 00 fd 3f e4 04... If it looks similar then the issue is because there are no included files in the winmail.dat file.