Security Labels in Internet Email, February 2015
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- K. Zeilenga
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This document describes a header field, SIO-Label, for use in Internet email to convey the sensitivity of the message. This header field may carry a textual representation (a display marking) and/or a structural representation (a security label) of the sensitivity of the message. This document also describes a header field, SIO-Label-History, for recording changes in the message's label.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.