\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}