\[\begin{tabular} {|l|p{0.4\textwidth}|}
\hline
	\multicolumn{1}{|c|}{\bf Key} & 
		\multicolumn{1}{|c|}{\bf Expansion} \\
\hline
	\tt sender & 
		the address of the sender of the message (original format) \\
	\tt 822sender & 
		the address of the sender (rfc822 format) \\
	\tt 400sender & 
		the address of the sender (x400 format) \\
	\tt recip & 
		the address of the recipient of the message (original format) \\ 
	\tt 822recip & 
		the address of the recipient (rfc822 format) \\
	\tt 400recip & 
		the address of the recipient (x400 format) \\
	\tt ua-id & 
		the user agent id of the message \\
	\tt p1-id & 
		the P1 id of the message \\
	\tt locsite &
		the local site name \\
	\tt locmta &
		the local mta name \\
	\tt reason & The reason for authorisation failure\\
	\tt direction & if the message is destined for the sender or
the recipient \\
\hline
\end{tabular}\]
