The present document specifies generally applicable policy and security requirements for Registered Electronic Mail Service Provider (REMSP)@ including the services they provide. The present document is applicable to: The policy and security requirements of REMS and EU REMS qualified providers. The general and security requirements of REMS and EU REMS qualified. The present document does not specify interconnection requirements. The present document aims to cover the common and worldwide-recognized requirements to address electronic registered delivery in a secure and reliable way. Particular attention is paid to the Regulation (EU) No 910/2014 [i.1]. However@ the legal effects of services implemented according to the present document are outside the scope of the present document.