{ subject => "subject", inreplyto => "reference_message_id", from => [ addressStruct1 ], messageid => "message_id", bcc => [ addressStruct1, addressStruct2 ], date => "Tue, 09 Jul 2002 14:15:53 -0400", replyto => [ adressStruct1, addressStruct2 ], to => [ adressStruct1, addressStruct2 ], sender => [ adressStruct1 ], cc => [ adressStruct1, addressStruct2 ], }