\begin{tabular}[hbt]{| r || p{0.16\textwidth} r | p{0.16\textwidth} r | p{0.16\textwidth} r |}
	\hline
	\# &
Bernstein & 2001 &
O'ReillyNet & 2007 &
MailRadar & \\
	\hline \hline
	1 &
\textbf{sendmail} & 42.3\,\% &
\textbf{sendmail} & 12.3\,\% &
\textbf{sendmail} & 24\,\% \\
	\hline
	2 &
Microsoft Exchange & 18.4\,\% &
\textbf{postfix} & 8.6\,\% &
\textbf{postfix} & 20\,\% \\
	\hline
	3 &
\textbf{qmail} & 17.4\,\% &
Microsoft Exchange & 7.6\,\% &
\textbf{qmail} & 17\,\% \\
	\hline
	4 &
IMail & 5.9\,\% &
\textbf{qmail} & 5.3\,\% &
Microsoft Mail & 15\,\% \\
	\hline
	5 &
\textbf{postfix} & 1.6\,\% &
\textbf{exim} & 5.0\,\% &
\textbf{exim} & 13\,\% \\
	\hline
	6 &
\textbf{exim} & 1.5\,\% &
Cisco & 3.0\,\% &
IMail & 2\,\% \\
	\hline
	7 &
NTMail & 1.3\,\% &
Barracuda & 2.8\,\% &
Microsoft Exchange & 1\,\% \\
%	\hline
%	8 &
%NetWin Dmail & 0.8\,\% &
% &  &
%mail security layers & 1\,\% \\
%	\hline
%	9 &
%Software.com Post.Office & 0.6\,\% &
% &  &
%InterMail & 1\,\% \\
%	\hline
%	10 &
% & &
% & &
%Lotus Domino & 1\,\% \\
%	\hline
	\hline \hline
	&
\textit{mail security layers} & $\approx$ 4\,\% & %smap 2.4 and some small ones
\textit{mail security layers} & $\approx$ 22\,\% &
\textit{mail security layers} & $\approx$ 2\,\% \\ % symantec 1
	\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}

