'          {NIL, "alternate-recipient:"},           {NIL, "approved:"}, 	 {NIL, "autoforwarded:"}, 	 {NIL, "autosubmitted:"}, 	 {NIL, "bcc:"}, 	 {NIL, "cc:"},  	 {NIL, "comment:"}, 	 {NIL, "comments:"},  	 {NIL, "content-identifier:"},  	 {NIL, "content-language:"}, & 	 {NIL, "content-transfer-encoding:"}, 	 {NIL, "content-type:"},  	 {NIL, "control:"},! 	 {NIL, "conversion-with-loss:"},  	 {NIL, "conversion:"},  	 {NIL, "date:",}, 	 {NIL, "delivery-date:"},'          {NIL, "delivery-receipt-to:"}, & 	 {NIL, "discarded-ipms-extensions:"},% 	 {NIL, "discarded-mts-extensions:"}, /          {NIL, "disposition-notification-to:"},  	 {NIL, "distribution:"}, + 	 {NIL, "dl-expansion-deferred-delivery:"}, (          {NIL, "dl-expansion-history:"}, 	 {NIL, "encrypted:"},          {NIL, "errors-to:"},  	 {NIL, "expires:"}, 	 {NIL, "followup-to:"}, 	 {NIL, "from:"},  	 {NIL, "importance:"},  	 {NIL, "in-reply-to:"},, 	 {NIL, "incomplete-latest-delivery-time:"}, 	 {NIL, "keywords:"},  	 {NIL, "lines:"}, 	 {NIL, "message-id:"}, 7 	 {NIL, "message-original-encoded-information-types:"},  	 {NIL, "mime-version:"},  	 {NIL, "mts-identifier:"},  	 {NIL, "newsgroups:"},  	 {NIL, "organization:"}, & 	 {NIL, "originator-return-address:"}, 	 {NIL, "originator:"},  	 {NIL, "path:"},  	 {NIL, "priority:"},           {NIL, "precedence:"}, 	 {NIL, "read-receipt-to:"}, 	 {NIL, "received:"},  	 {NIL, "recipients:"},  	 {NIL, "references:"},  	 {NIL, "relay-version:"}, 	 {NIL, "reply-by:"},  	 {NIL, "reply-to:"},  	 {NIL, "return-path:"},$          {NIL, "return-receipt-to"}, 	 {NIL, "sender"}, 	 {NIL, "sensitivity:"}, 	 {NIL, "subject:"}, 	 {NIL, "supercedes:"},  	 {NIL, "supersedes:"},  	 {NIL, "to:"},  	 {NIL, "via:"},          {NIL, "warnings-to:"}