attOriginalMessageClass

A message class is stored as a string. The encoded string usually holds the MAPI-specified name of the message class. The exception is that to provide compatibility with Microsoft Mail for Windows for Workgroups 3.1, the following MAPI message classes are mapped to the following Microsoft Mail for Windows for Workgroups 3.1 message classes:

MAPI message class

Windows for Workgroups Mail 3.x

IPM

IPM.Microsoft Mail.Note

IPM.Note

IPM.Microsoft Mail.Note

IPM.Schedule.Meeting.Canceled

IPM.Microsoft Schedule.MtgCncl

IPM.Schedule.Meeting.Request

IPM.Microsoft Schedule.MtgReq

IPM.Schedule.Meeting.Resp.Neg

IPM.Microsoft Schedule.MtgRespN

IPM.Schedule.Meeting.Resp.Pos

IPM.Microsoft Schedule.MtgRespP

IPM.Schedule.Meeting.Resp.Tent

IPM.Microsoft Schedule.MtgRespA

Report.IPM.Note.NDR

IPM.Microsoft Mail.Non-Delivery

Report.IPM.Note.RN

IPM.Microsoft Mail.Read Receipt