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Mail (MX) Server Survey
January 1st, 2008

Report Description
This report is a comprehensive report involving all mail servers we know of visible on the internet. For each domain in our conventional web server survey, we also determine the list of mail servers that provide inbound mail services (via MX record lookups). Each unique mail server is connected to once each month, where we wait for the server's "220 " message which usually accompanies a banner revealing the server software being used.

Basic Response Statistics
When connecting to an MX server, a number of different responses are possible. The remote server may not be up and running or completely refusing connections, it may not respond back with a "220 " line in the amount of time we wait, nor will it always provide a banner that identifies the type of software running.

Description> Number of Servers Percent
Total Number of MX Servers Queried1,772,491   100.0%
Number of Servers that didn't respond285,11316.09%
    Server didn't open socket273,93215.45%
    Server didn't provide banner11,1810.63%
Server provided banner1,487,37883.91%
Server banner identifies software in use885,81449.98%

As indicated by the above table, of the 1,772,491 servers queried, only 885,814 servers responded with a banner that allow us to identify the software being used. All of the remaining information in this report is based on the responses that allowed us to identify the software in use.

Basic Technology Breakdown
Server Type Number of Servers Percent
Sendmail234,27226.45%
Microsoft197,82222.33%
Exim191,34621.60%
Postfix140,75415.89%
IMail26,9653.04%
MDaemon22,0212.49%
MailEnable21,9892.48%
Lotus Domino7,0370.79%
Merak6,7040.76%
Kerio5,1260.58%
CommuniGate Pro4,9350.56%
WinWebMail4,3010.49%
Trend Micro3,6380.41%
GroupWise3,1770.36%
ArGoSoft2,7590.31%
XMail2,5890.29%
SurgeSMTP1,8300.21%
Qmail Toaster1,5520.18%
Gordano Messaging Suite (GMS)1,1370.13%
Post.Office1,0080.11%
NetIQ MailMarshal7860.09%
InterScan VirusWall7830.09%
Interscan6280.07%
Mirapoint5720.06%
VisNetic5380.06%
MagicMail3560.04%
ModusMail2400.03%
WebSTAR V2290.03%
Mercury2130.02%
Neon Mail Server1750.02%
MAILsweeper1050.01%
MessageWall1000.01%
WebSTAR890.01%
OpenVMS380.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Sendmail (234,272 servers)

Version Number of Servers Percent
8.12.11.2006030830,23012.90%
8.12.11.2006061427,60611.78%
8.13.127,22511.62%
8.13.623,53310.05%
8.11.622,1439.45%
8.12.1015,9236.80%
8.13.815,2986.53%
8.13.6.2006061410,3614.42%
8.14.19,5674.08%
8.12.119,4964.05%
8.13.47,9923.41%
8.12.86,9312.96%
8.13.75,9862.56%
8.9.33,9971.71%
8.10.23,7091.58%
Other14,2756.09%

Microsoft (197,822 servers)

Version Number of Servers Percent
6.0.3790.3959107,11154.15%
6.0.3790.183054,89727.75%
5.0.2195.671321,66510.95%
6.0.3790.2118,7934.44%
Other5,3562.71%

Exim (191,346 servers)

Version Number of Servers Percent
4.68116,56560.92%
4.6332,57217.02%
4.667,7564.05%
4.507,6263.99%
4.607,1883.76%
4.674,2232.21%
4.623,8782.03%
4.522,4481.28%
Other9,0904.75%

Postfix (140,754 servers)

Version Number of Servers Percent
Other140,754100.00%

IMail (26,965 servers)

Version Number of Servers Percent
8.225,40020.03%
8.154,68217.36%
8.052,4208.97%
9.211,9297.15%
9.101,6276.03%
9.221,3865.14%
7.071,1314.19%
7.151,0453.88%
9.209993.70%
6.068083.00%
8.005952.21%
9.235682.11%
8.215291.96%
8.203841.42%
8.043371.25%
8.103141.16%
8.122841.05%
Other2,5279.37%

MDaemon (22,021 servers)

Version Number of Servers Percent
9.6.34,24019.25%
9.6.22,63711.97%
9.5.61,2945.88%
9.6.11,1995.44%
8.1.31,0984.99%
9.0.41,0394.72%
9.5.26853.11%
6.8.56833.10%
9.5.16793.08%
7.2.35912.68%
7.2.04952.25%
9.0.14772.17%
9.5.54151.88%
9.0.04061.84%
8.1.43951.79%
9.5.43901.77%
8.0.23711.68%
9.6.03471.58%
8.1.13341.52%
9.5.32951.34%
8.0.32751.25%
7.1.22711.23%
8.1.52661.21%
9.0.72421.10%
7.1.02281.04%
7.2.22261.03%
Other2,44311.09%

MailEnable (21,989 servers)

Version Number of Servers Percent
1.981--5,18523.58%
1.96--1,8368.35%
1.983--1,6387.45%
1.95--1,5477.04%
1.9--1,3896.32%
1.8--1,2315.60%
0-2.37-1,0434.74%
0-1.85-1,0014.55%
0-2.38-6843.11%
0-2.36-5012.28%
0--2.374452.02%
0-3.04-4081.86%
0--2.383851.75%
0-2.40-3321.51%
0--3.042491.13%
0-1.841-2411.10%
Other3,87417.62%

Lotus Domino (7,037 servers)

Version Number of Servers Percent
7.0.292113.09%
7.0.2FP25507.82%
6.5.45017.12%
7.0.14536.44%
6.5.14306.11%
6.5.33585.09%
6.5.53384.80%
7.03084.38%
7.0.2FP12864.06%
8.02783.95%
6.52583.67%
5.0.111952.77%
6.5.21672.37%
7.0.31602.27%
5.0.121201.71%
5.0.101071.52%
6.5.5FP21001.42%
7.0.1FP1971.38%
5.0.13a951.35%
5.0.8921.31%
6.5.6901.28%
6.0.2CF1811.15%
6.5.4FP2811.15%
6.0.3771.09%
6.5.4FP3741.05%
6.5.6FP1711.01%
Other74910.64%

Merak (6,704 servers)

Version Number of Servers Percent
8.0.31,99029.68%
8.9.11,06715.92%
8.5.05307.91%
7.4.53164.71%
8.3.82884.30%
7.5.22814.19%
9.0.02734.07%
7.6.42724.06%
7.4.21622.42%
7.2.01221.82%
8.2.41051.57%
8.9.01031.54%
6.2.1911.36%
8.3.0791.18%
7.4.0731.09%
7.6.1721.07%
Other88013.13%

Kerio (5,126 servers)

Version Number of Servers Percent
6.4.11,49529.17%
6.3.186316.84%
6.4.067813.23%
6.4.24468.70%
6.3.02785.42%
6.2.21252.44%
6.1.31152.24%
6.1.21122.18%
6.2.01072.09%
6.1.01062.07%
6.0.10931.81%
6.1.4921.79%
6.0.3731.42%
6.1.1561.09%
Other4879.50%

CommuniGate Pro (4,935 servers)

Version Number of Servers Percent
4.1.855011.14%
5.1.123727.54%
4.2.103607.29%
5.1.133006.08%
5.1.102104.26%
5.1.111923.89%
5.0.91873.79%
5.0.131793.63%
5.1.91483.00%
5.1.81332.70%
5.1.71252.53%
4.2.81092.21%
5.21042.11%
4.3.12961.95%
4.2.7921.86%
4.2871.76%
5.0.11851.72%
5.0.8811.64%
5.1.5801.62%
4.2.9791.60%
4.0.6691.40%
5.1.3641.30%
5.1.6581.18%
5.1.2571.16%
4.3.8541.09%
3.5.9511.03%
Other1,01320.53%

WinWebMail (4,301 servers)

Version Number of Servers Percent
3.7.3.11,52735.50%
3.7.1.185219.81%
3.6.3.152412.18%
3.7.5.14159.65%
3.7.0.54079.46%
3.7.0.72746.37%
3.7.0.32505.81%
Other521.21%

Trend Micro (3,638 servers)

Version Number of Servers Percent
5.71,64745.27%
5.51,42339.11%
5.1844312.18%
7.0671.84%
Other581.59%

GroupWise (3,177 servers)

Version Number of Servers Percent
7.0.21,01631.98%
7.0.149815.68%
6.5.737811.90%
6.5.42537.96%
6.5.61775.57%
6.0.41625.10%
7.01253.93%
6.5.51223.84%
6.5.11073.37%
6.0.2511.61%
6.5.3501.57%
6.5.2481.51%
6.0.3411.29%
5.5.5351.10%
Other1143.59%

ArGoSoft (2,759 servers)

Version Number of Servers Percent
1.8 (1.8.9.1)54719.83%
1.8 (1.8.8.8)36513.23%
1.8 (1.8.9.3)30310.98%
1.8 (1.8.8.7)29710.76%
1.8 (1.8.9.2)27710.04%
1.8 (1.8.8.9)1415.11%
1.8 (1.8.9.0)722.61%
1.8 (1.8.8.1)632.28%
1.8 (1.8.8.2)602.17%
1.8 (1.8.6.0)572.07%
1.8 (1.8.8.3)391.41%
1.8 (1.8.5.9)351.27%
1.8 (1.8.8.4)351.27%
1.8 (1.8.7.5)301.09%
Other43815.88%

XMail (2,589 servers)

Version Number of Servers Percent
1.2288634.22%
1.2462524.14%
1.2135113.56%
1.201465.64%
1.171455.60%
1.231375.29%
1.12823.17%
1.16431.66%
1.18401.54%
1.25311.20%
Other1033.98%

SurgeSMTP (1,830 servers)

Version Number of Servers Percent
3.8k4-456730.98%
3.8i3-319210.49%
3.7b8-81669.07%
3.8f3-31196.50%
3.8o-11156.28%
3.6f5-5935.08%
3.8f2-2744.04%
3.5b3-3603.28%
3.8k2-2583.17%
3.0c2-2512.79%
3.7b6-6392.13%
3.8m-1261.42%
3.8k-1241.31%
3.8i-1241.31%
2.1c7-7191.04%
Other20311.09%

Qmail Toaster (1,552 servers)

Version Number of Servers Percent
1.31,10070.88%
1.237324.03%
1.0795.09%
Other00.00%

Gordano Messaging Suite (GMS) (1,137 servers)

Version Number of Servers Percent
Other1,137100.00%

Post.Office (1,008 servers)

Version Number of Servers Percent
3.5.327026.79%
4.0.110110.02%
3.5.3J767.54%
3.8.3626.15%
3.6.3545.36%
3.6.2424.17%
3.9.1373.67%
3.1.2J343.37%
3.9.2.3302.98%
3.9.0272.68%
3.9.2272.68%
3.1.2242.38%
3.8.4222.18%
3.8.7.4201.98%
4.0.0.2171.69%
3.5.2171.69%
3.6.0141.39%
3.9.1.3141.39%
3.8.2141.39%
3.9.2.1131.29%
4.0.0.1131.29%
Other807.94%

NetIQ MailMarshal (786 servers)

Version Number of Servers Percent
6.0.3.859375.45%
5.5.6.7486.11%
6.1.3.15344.33%
5.5.6.6202.54%
5.5.4.16182.29%
5.5.5.9162.04%
5.5.6.5151.91%
5.5.5.6111.40%
5.5.4.1781.02%
Other232.93%

InterScan VirusWall (783 servers)

Version Number of Servers Percent
Other783100.00%

Interscan (628 servers)

Version Number of Servers Percent
3.55 (build 1016)11718.63%
3.81-Build_10227612.10%
3.8-Build_30137011.15%
3.53 (build 2017)548.60%
3.55 (build 1029)538.44%
3.53 (build 2011)497.80%
3.81-Build_1084447.01%
3.52 (build 1375)223.50%
3.53 (build 2013)223.50%
3.53 (build 1493)223.50%
3.55 (build 1020)203.18%
3.8-Build_108091.43%
3.81-Build_105581.27%
3.8-Build_306571.11%
3.81-Build_102171.11%
Other487.64%

Mirapoint (572 servers)

Version Number of Servers Percent
3.8.3-GA11219.58%
3.8.4-GA10418.18%
3.8.5-GA8514.86%
3.7.5a-GA6411.19%
3.8.2-GA468.04%
3.8.6-GA284.90%
3.7.3a-GA274.72%
3.7.4b-GA254.37%
3.7.5-GA132.27%
3.5.8-GR91.57%
1.1.091.57%
3.7.2-GA81.40%
3.7.1-GA81.40%
3.7.3-GA61.05%
Other284.90%

VisNetic (538 servers)

Version Number of Servers Percent
8.5.0.88014.87%
9.1.4.0529.67%
7.2.4.1366.69%
8.0.3.0325.95%
8.0.3.1315.76%
5.8.6.6315.76%
6.2.2.0305.58%
8.3.5.0285.20%
5.5.8.3244.46%
5.0.2.3234.28%
7.6.1.0193.53%
5.3.5.0173.16%
8.3.6142.60%
8.5.0.5132.42%
8.0.3132.42%
5.4.5.4122.23%
7.5.3.0112.04%
8.3.0.171.30%
9.1.4.161.12%
5.0.2.161.12%
7.2.4.061.12%
5.8.6.461.12%
Other417.62%

MagicMail (356 servers)

Version Number of Servers Percent
Other356100.00%

ModusMail (240 servers)

Version Number of Servers Percent
4.35.480.08133.75%
3.2.315.03012.50%
4.1.361.212510.42%
4.2.425.222410.00%
4.35.477.0187.50%
3.0.273.0125.00%
3.1.302.0104.17%
4.3.459.083.33%
4.35.480.1172.92%
4.0.340.041.67%
4.1.361.031.25%
4.2.420.031.25%
Other156.25%

WebSTAR V (229 servers)

Version Number of Servers Percent
5.4.07331.88%
5.4.15825.33%
5.3.45122.27%
5.3.3229.61%
5.3.2166.99%
5.3.062.62%
Other31.31%

Mercury (213 servers)

Version Number of Servers Percent
1.4810046.95%
3.327032.86%
3.21c177.98%
1.4483.76%
1.4762.82%
3.3162.82%
Other62.82%

Neon Mail Server (175 servers)

Version Number of Servers Percent
3.0.94827.43%
3.0.74827.43%
3.1.23419.43%
3.1.02816.00%
3.0.674.00%
3.0.852.86%
3.1.321.14%
3.0.521.14%
Other10.57%

MAILsweeper (105 servers)

Version Number of Servers Percent
4.3.20.02220.95%
4.3.17.01716.19%
4.3.14.01514.29%
4.3.12.01211.43%
4.3.19.01211.43%
4.2.10.087.62%
4.3.6.054.76%
4.3.1.054.76%
4.3.10.043.81%
4.2.5.032.86%
Other21.90%

MessageWall (100 servers)

Version Number of Servers Percent
1.0.87979.00%
1.0.111717.00%
1.1.022.00%
1.0.622.00%
Other00.00%

WebSTAR (89 servers)

Version Number of Servers Percent
Other89100.00%

OpenVMS (38 servers)

Version Number of Servers Percent
7.31231.58%
8.21026.32%
8.31026.32%
7.2513.16%
6.112.63%
Other00.00%




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