This Recommendation specifies how to make e-mails reliable in terms of identification and confidentiality. Certified mail transfer protocol/certified post office protocol (CMTP/CPOP) enables: ?C the solution of repudiation issues because of the use of electronic signature; ?C the solution of confidentiality issues because of the use of encryption; ?C the production of reliable notices of deposit@ notices of transit and notices of reception; ?C the use of a certified mail (Cmail) server to track certified mails to avoid their loss during the process; ?C the use of a transport layer security (TLS) connection to provide stronger identification. This stronger level of identification is required by the Cmail server. Conformity with this Recommendation is not to be taken as any proof of evidence for claiming compliance with any national or regional law@ regulation or policy. The technical@ organizational and procedural means described in this Recommendation do not guarantee in any way the constitution of any level of security that may be put upon certain correspondence by specific national or regional law@ regulation or policy.