Method for delivering electronic mails on request from an electronic mail server to at least one remote client via an internet network, said method being characterized in that said electronic mail server exchanges data with at least one storage server and in that it comprises a delivery step comprising the operations of: receiving, from a remote client, on the electronic mail server, a request for delivery of an electronic mail identified by an electronic mail identifier; obtaining, from at least one storage server, data to be encapsulated and message attribute data associated with the electronic mail identifier; generating an identified electronic mail from the data to be encapsulated and the message attribute data; and transmitting the identified electronic mail to the remote client.