MessageFlag public enum MessageFlag Documentation Associated = 0 FromMe = 1 HasAttachment = 2 NonReadReportPending = 3 OriginInternet = 4 OriginMiscExternal = 5 OriginX400 = 6 Read = 7 ReadReportPending = 9 Resend = 8 Submit = 10 Unmodified = 11 Unsent = 12