Article 706-95-2 of the French Code of Criminal Procedure
If the requirements of information relating to a crime or one of the offences falling within the scope of Articles 706-73 and 706-73-1 so require, the investigating judge may authorise by reasoned order remote access, without the knowledge of the person concerned, to correspondence stored via electronic communications accessible by means of a computer identifier. The data to which access has been granted may be seized and recorded or copied…