\begin{tabular}[hbt]{| r || p{0.16\textwidth} r | p{0.16\textwidth} r | p{0.16\textwidth} r |}
	\hline
	\# &
O'ReillyNet & 2007 &
MailRadar & YYYY &
Bernstein & 2001 \\
	\hline \hline
	1 &
mail security layers & \textgreater 22\% &
\textbf{sendmail} & 24\% &
\textbf{sendmail} & 42.3\% \\
	\hline
	2 &
\textbf{sendmail} & 12.3\% &
\textbf{postfix} & 20\% &
Microsoft Exchange & 18.4\% \\
	\hline
	3 &
\textbf{postfix} & 8.6\% &
\textbf{qmail} & 17\% &
\textbf{qmail} & 17.4\% \\
	\hline
	4 &
Microsoft Exchange & 7.6\% &
Microsoft Mail & 15\% &
IMail & 5.9\% \\
	\hline
	5 &
\textbf{qmail} & 5.3\% &
\textbf{exim} & 13\% &
smap & 2.4\% \\
	\hline
	6 &
\textbf{exim} & 5.0\% &
IMail & 2\% &
\textbf{postfix} & 1.6\% \\
	\hline
	7 &
Cisco & 3.0\% &
Microsoft Exchange & 1\% &
\textbf{exim} & 1.5\% \\
	\hline
%	8 &
%Barracuda & 2.8\% &
%mail security layers & 1\% &
%NTMail & 1.3\% \\
%	\hline
%	9 &
% &  &
%InterMail & 1\% &
%NetWin Dmail & 0.8\% \\
%	\hline
%	10 &
% & &
%Lotus Domino & 1\% &
%Software.com Post.Office & 0.6\% \\
%	\hline
\end{tabular}
%\begin{tabular}[hbt]{| r || p{0.16\textwidth} r | p{0.16\textwidth} r | p{0.16\textwidth} r |}
%	\hline
%	\# & O'ReillyNet & 2007 & MailRadar & YYYY & Bernstein & 2001 \\
%	\hline \hline
%	1 & \textbf{sendmail} & 12.3\% & \textbf{sendmail} & 24\% & \textbf{sendmail} & 42.3\% \\
%	\hline
%	2 & \textbf{postfix} & 8.6\% & \textbf{postfix} & 20\% & Microsoft Exchange & 18.4\% \\
%	\hline
%	3 & Postini & 8.5\% & \textbf{qmail} & 17\% & \textbf{qmail} & 17.4\% \\
%	\hline
%	4 & Microsoft Exchange & 7.6\% & Microsoft Mail & 15\% & IMail & 5.9\% \\
%	\hline
%	5 & MXLogic & 6.0\% & \textbf{exim} & 13\% & smap & 2.4\% \\
%	\hline
%	6 & \textbf{qmail} & 5.3\% & IMail & 2\% & \textbf{postfix} & 1.6\% \\
%	\hline
%	7 & \textbf{exim} & 5.0\% & Microsoft Exchange & 1\% & \textbf{exim} & 1.5\% \\
%	\hline
%	8 & Concentric Hosting & 4.5\% & Symantec Mail Security & 1\% & NTMail & 1.3\% \\
%	\hline
%	9 & Cisco & 3.0\% & InterMail & 1\% & NetWin Dmail & 0.8\% \\
%	\hline
%	10 & Barracuda & 2.8\% & Lotus Domino & 1\% & Software.com Post.Office & 0.6\% \\
%	\hline
%\end{tabular}