1 \begin{tabular}[hbt]{| r || p{0.16\textwidth} r | p{0.16\textwidth} r | p{0.16\textwidth} r |}

2 \hline

3 \# &

4 Bernstein & 2001 &

5 O'ReillyNet & 2007 &

6 MailRadar & \\

7 \hline \hline

8 1 &

9 \textbf{sendmail} & 42.3\% &

10 \textbf{sendmail} & 12.3\% &

11 \textbf{sendmail} & 24\% \\

12 \hline

13 2 &

14 Microsoft Exchange & 18.4\% &

15 \textbf{postfix} & 8.6\% &

16 \textbf{postfix} & 20\% \\

17 \hline

18 3 &

19 \textbf{qmail} & 17.4\% &

20 Microsoft Exchange & 7.6\% &

21 \textbf{qmail} & 17\% \\

22 \hline

23 4 &

24 IMail & 5.9\% &

25 \textbf{qmail} & 5.3\% &

26 Microsoft Mail & 15\% \\

27 \hline

28 5 &

29 \textbf{postfix} & 1.6\% &

30 \textbf{exim} & 5.0\% &

31 \textbf{exim} & 13\% \\

32 \hline

33 6 &

34 \textbf{exim} & 1.5\% &

35 Cisco & 3.0\% &

36 IMail & 2\% \\

37 \hline

38 7 &

39 NTMail & 1.3\% &

40 Barracuda & 2.8\% &

41 Microsoft Exchange & 1\% \\

42 % \hline

43 % 8 &

44 %NetWin Dmail & 0.8\% &

45 % & &

46 %mail security layers & 1\% \\

47 % \hline

48 % 9 &

49 %Software.com Post.Office & 0.6\% &

50 % & &

51 %InterMail & 1\% \\

52 % \hline

53 % 10 &

54 % & &

55 % & &

56 %Lotus Domino & 1\% \\

57 % \hline

58 \hline \hline

59 &

60 \textit{mail security layers} & \textgreater 2\% & %smap 2.4

61 \textit{mail security layers} & \textgreater 22\% &

62 \textit{mail security layers} & \textgreater 1\% \\ % symantec 1

63 \hline

64 \end{tabular}

65

66

67

68 %\begin{tabular}[hbt]{| r || p{0.16\textwidth} r | p{0.16\textwidth} r | p{0.16\textwidth} r |}

69 % \hline

70 % \# & O'ReillyNet & 2007 & MailRadar & YYYY & Bernstein & 2001 \\

71 % \hline \hline

72 % 1 & \textbf{sendmail} & 12.3\% & \textbf{sendmail} & 24\% & \textbf{sendmail} & 42.3\% \\

73 % \hline

74 % 2 & \textbf{postfix} & 8.6\% & \textbf{postfix} & 20\% & Microsoft Exchange & 18.4\% \\

75 % \hline

76 % 3 & Postini & 8.5\% & \textbf{qmail} & 17\% & \textbf{qmail} & 17.4\% \\

77 % \hline

78 % 4 & Microsoft Exchange & 7.6\% & Microsoft Mail & 15\% & IMail & 5.9\% \\

79 % \hline

80 % 5 & MXLogic & 6.0\% & \textbf{exim} & 13\% & smap & 2.4\% \\

81 % \hline

82 % 6 & \textbf{qmail} & 5.3\% & IMail & 2\% & \textbf{postfix} & 1.6\% \\

83 % \hline

84 % 7 & \textbf{exim} & 5.0\% & Microsoft Exchange & 1\% & \textbf{exim} & 1.5\% \\

85 % \hline

86 % 8 & Concentric Hosting & 4.5\% & Symantec Mail Security & 1\% & NTMail & 1.3\% \\

87 % \hline

88 % 9 & Cisco & 3.0\% & InterMail & 1\% & NetWin Dmail & 0.8\% \\

89 % \hline

90 % 10 & Barracuda & 2.8\% & Lotus Domino & 1\% & Software.com Post.Office & 0.6\% \\

91 % \hline

92 %\end{tabular}