2062 ZFO (Sent Message) File Aggregate This variant of ZFO file is container for sent data mailbox messages provided by Česká pošta, s.p. ZFO file is a ZIP archive file (PKCS #7 Cryptographic Message File) composing of the layout structure using XML elements (envelope) and data instance encoded as Base64 (message content). The message may contain one or more attachments in the file format specified in Annex 3 to Decree No. 194/2009 Col. The whole tructure is always embedded into a digital signature represented by XML elements of the XML Signature standard. 242 The National Archives of the Czech Republic / The National Archives of the Czech Republic 18 Jan 2020 18 Jan 2020 application/vnd.software602.filler.form-xml-zip MIME fmt/1244 PUID zfo File extension 1621 ZFO (Sent Message) File Magic bytes: http://isds.czechpoint.cz/v20/SentMessage 1 Absolute from BOF 0 20500 687474703A2F2F697364732E637A656368706F696E742E637A2F7632302F53656E744D657373616765 Has priority over 1469 PKCS #7 Cryptographic Message File