scope:

The present document specifies requirements for achieving interoperability between the Registered Electronic Mail systems that are compliant with TS 102 640 (REM henceforth) specification [1] to [3] and systems that are compliant with UPU S52-1 UPU Postal Registered electronic Mail functional specification (PReM henceforth) [4].

The approach used for this purpose is to define all the necessary mappings between the two specifications taking into account also the objective to maintain and preserve the positive features present in both the realities as pursued in the Technical Specifications.

The present document is structured as follows:

• Clause 4: General requirements.

• Clause 5: Mapping of terms and definitions among REM and PReM.

• Clause 6: Mapping of boundary roles.

• Clause 7: Functional GAP analysis between REM and PReM.

• Clause 8: High level definition of the inter-communication flows between REM and PReM.

• Clause 9: Mapping of exchanged formats (structure of messages, attachments, signature etc).

• Clause 10: Mapping of evidence names and semantics.

• Clause 11: Mapping of protocol elements.

• Clause 12: Definition of mutual recognition system based on ETSI-TSL and UPU-Designated Operator Trusted List.