1	From
2	Subject
3	Received
4	Size
5	CompuServe Mail
6	Internet Mail
7	Microsoft Mail
8	Microsoft Fax
9	Microsoft Fax Transport
51	attach\sis00001.
52	IPM.Schedule.Meeting.Request
53	IPM.Schedule.Meeting.Canceled
54	IPM.Schedule.Meeting.Resp.Pos
55	IPM.Schedule.Meeting.Resp.Neg
56	IPM.Schedule.Meeting.Resp.Tent