meillo@9: \begin{tabular}[hbt]{| l || c | c | c |}
meillo@9: 	\hline
meillo@9: 	Requirement & Importance & Pending work & Focus \\
meillo@9: 	\hline \hline
meillo@9: 	RF\,1: In/out channels    & ++ & - & + \\
meillo@9: 	RF\,2: Mail queuing       & ++ & - & + \\
meillo@9: 	RF\,3: Header sanitizing  & 0 & - & - \\
meillo@9: 	RF\,4: Aliasing           & 0 & - & - \\
meillo@9: 	RF\,5: Route management   & + & - & 0 \\
meillo@9: 	RF\,6: Authentication     & ++ & + & +++ \\
meillo@9: 	RF\,7: Encryption         & ++ & + & +++ \\
meillo@9: 	RF\,8: Spam handling      & + & ++ & +++ \\
meillo@9: 	RF\,9: Malware handling   & - & + & 0 \\
meillo@9: 	RF\,10: Archiving         & - & + & 0 \\
meillo@9: 	\hline
meillo@9: \end{tabular}