A il @ a Com pa N Y . co M . ▁ ▁The ▁concept ▁is ▁that ▁Case Keys ▁software ▁is ▁installed ▁on ▁either ▁the ▁client ▁PC ▁or ▁the ▁mail ▁server ▁which ▁allows ▁every ▁message ▁– ▁both ▁incoming ▁and ▁out going ▁to ▁be ▁intercept ed ▁and ▁processed . ▁ ▁Out going ▁messages ▁are ▁processed ▁with ▁each ▁instance ▁of ▁the ▁protected ▁user ’ s ▁email ▁address ▁being ▁encoded ▁with ▁a ▁unique ▁Case Key . ▁The ▁Case Key ▁encoding , ▁the ▁message ▁recip ient , ▁and ▁option ally ▁other ▁details ▁of ▁the ▁out going ▁message ▁are ▁then ▁recorded . ▁ ▁In ▁the ▁other ▁direction , ▁incoming ▁messages ▁are ▁sc anned ▁for ▁any ▁Case Key - encoded ▁instances ▁of ▁the ▁protected ▁user ’ s ▁email ▁address , ▁with ▁the ▁recovered ▁Case Key ▁codes ▁being ▁authentic ated ▁against ▁the ▁list ▁of ▁those ▁previously ▁issued . ▁Mess ages ▁found ▁to ▁contain ▁valid ▁Case Keys ▁are ▁then ▁marked ▁as ▁not ▁sp am ▁to ▁prevent ▁sp am ▁filters ▁from ▁mis rout ing ▁the ▁message ▁to ▁the ▁user ’ s ▁j unk ▁folder . ▁Other ▁particular s ▁of ▁the ▁original ▁message ▁may ▁also ▁be ▁recovered ▁and ▁included ▁with ▁the ▁delivery ▁of ▁the ▁message ▁– ▁such ▁as ▁who ▁the ▁original ▁message ▁was ▁issued ▁to ▁and ▁when ▁it ▁was ▁issued . ▁It ▁may ▁even ▁be ▁used ▁to ▁automatically ▁include ▁a ▁copy ▁of ▁the ▁original ▁message ▁for ▁the ▁convenience ▁of ▁the ▁protected ▁user . ▁ ▁Sp amb order ▁▁ ▁Sp amb order ▁has ▁been ▁designed ▁around ▁the ▁assumption ▁that ▁very ▁little ▁sp am ▁origin