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Mail (MX) Server Survey
January 1st, 2010

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 Queried2,041,893   100.0%
Number of Servers that didn't respond334,77216.40%
    Server didn't open socket322,29415.78%
    Server didn't provide banner12,4780.61%
Server provided banner1,707,12183.60%
Server banner identifies software in use950,14346.53%

As indicated by the above table, of the 2,041,893 servers queried, only 950,143 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
Exim292,08930.74%
Postfix189,33719.93%
Microsoft185,20419.49%
Sendmail176,24018.55%
MailEnable29,1473.07%
MDaemon23,0202.42%
IMail15,0171.58%
Kerio7,4370.78%
Lotus Domino5,6530.59%
WinWebMail5,2570.55%
CommuniGate Pro4,0970.43%
Merak3,2510.34%
XMail2,7140.29%
Qmail Toaster1,8140.19%
ArGoSoft1,6670.18%
GroupWise1,6150.17%
SurgeSMTP1,4920.16%
Trend Micro1,2890.14%
Gordano Messaging Suite (GMS)6870.07%
Post.Office6230.07%
Mirapoint4350.05%
MagicMail4170.04%
VisNetic3920.04%
InterScan VirusWall3720.04%
NetIQ MailMarshal2120.02%
Interscan1650.02%
WebSTAR V1050.01%
Mercury1040.01%
Neon Mail Server1020.01%
MessageWall540.01%
ModusMail400.00%
WebSTAR380.00%
MAILsweeper290.00%
OpenVMS260.00%
OpenSMTPD20.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (292,089 servers)

Version Number of Servers Percent
4.69244,70383.78%
4.6314,2914.89%
4.6713,3984.59%
4.664,2351.45%
4.683,1061.06%
4.602,9261.00%
Other9,4303.23%

Postfix (189,337 servers)

Version Number of Servers Percent
Other189,337100.00%

Microsoft (185,204 servers)

Version Number of Servers Percent
6.0.3790.3959158,28585.47%
6.0.3790.183015,4048.32%
5.0.2195.67137,5484.08%
Other3,9672.14%

Sendmail (176,240 servers)

Version Number of Servers Percent
8.13.134,42619.53%
8.13.824,17613.72%
8.14.317,99010.21%
8.12.11.2006061415,1328.59%
8.12.11.2006030814,7728.38%
8.13.612,4477.06%
8.13.6.2006061410,4675.94%
8.12.106,7983.86%
8.11.66,3323.59%
8.14.25,6103.18%
8.14.14,6712.65%
8.12.114,6182.62%
8.13.43,5802.03%
8.13.73,2601.85%
8.12.82,9651.68%
8.9.31,8561.05%
Other7,1404.05%

MailEnable (29,147 servers)

Version Number of Servers Percent
1.986--7,93727.23%
1.981--3,93513.50%
1.983--2,5638.79%
3.62--1,6805.76%
1.95--7732.65%
1.96--7632.62%
0-3.63-6172.12%
1.9--6092.09%
0-3.61-5341.83%
0-3.6-5121.76%
4.0--4521.55%
0-2.53-4501.54%
0-1.87-4341.49%
1.8--4211.44%
0-3.62-4091.40%
0-3.14-3911.34%
0-2.37-3511.20%
--3.633351.15%
--3.612951.01%
Other5,68619.51%

MDaemon (23,020 servers)

Version Number of Servers Percent
10.1.23,39314.74%
10.1.12,97912.94%
10.0.01,4516.30%
9.6.11,1134.83%
10.0.51,0824.70%
9.6.69864.28%
10.1.08193.56%
10.0.48133.53%
9.6.57553.28%
9.5.27083.08%
10.0.26232.71%
9.6.45692.47%
8.1.35612.44%
9.5.15432.36%
9.5.65322.31%
9.6.25102.22%
9.0.44902.13%
9.6.33221.40%
6.8.53091.34%
7.2.33021.31%
9.0.12831.23%
9.5.52791.21%
10.0.12611.13%
7.2.02601.13%
Other3,07713.37%

IMail (15,017 servers)

Version Number of Servers Percent
8.222,89419.27%
11.01,68911.25%
8.151,4779.84%
9.231,1837.88%
10.021,0416.93%
8.058235.48%
9.105843.89%
9.205703.80%
7.075303.53%
10.015243.49%
9.214232.82%
7.153892.59%
6.063172.11%
8.002821.88%
8.212041.36%
8.101951.30%
10.01921.28%
8.041831.22%
8.011691.13%
9.221661.11%
Other1,1827.87%

Kerio (7,437 servers)

Version Number of Servers Percent
6.7.22,02327.20%
6.7.098613.26%
6.6.288611.91%
6.7.16839.18%
6.5.23815.12%
6.5.03514.72%
6.4.12603.50%
6.3.12403.23%
6.6.01942.61%
6.5.11902.55%
6.4.01692.27%
6.6.11502.02%
6.7.31391.87%
6.4.21241.67%
6.3.01111.49%
Other5507.40%

Lotus Domino (5,653 servers)

Version Number of Servers Percent
8.560210.65%
8.5.14678.26%
7.0.24487.92%
8.0.23305.84%
8.0.12975.25%
7.0.32845.02%
7.0.12434.30%
6.5.42203.89%
6.5.12003.54%
8.5FP11863.29%
6.5.31733.06%
7.0.2FP21662.94%
7.0.3FP11622.87%
6.5.51482.62%
7.01442.55%
8.01442.55%
6.51252.21%
5.0.11721.27%
7.0.2FP1691.22%
8.0.2FP1671.19%
6.5.2661.17%
6.5.6601.06%
7.0.2FP3601.06%
Other92016.27%

WinWebMail (5,257 servers)

Version Number of Servers Percent
3.8.0.11,16522.16%
3.7.6.11,00319.08%
3.7.3.179315.08%
3.7.7.373614.00%
3.7.1.14268.10%
3.7.5.12574.89%
3.6.3.12244.26%
3.7.7.11863.54%
3.7.0.51833.48%
3.7.0.71242.36%
3.7.0.31232.34%
Other370.70%

CommuniGate Pro (4,097 servers)

Version Number of Servers Percent
5.2.163358.18%
4.1.82656.47%
5.1.131854.52%
5.2.141754.27%
4.2.101654.03%
5.1.161533.73%
5.2.121533.73%
5.2.131353.30%
5.2.171313.20%
5.1.121132.76%
5.2.181102.68%
5.2.81042.54%
5.2.31032.51%
5.2.10952.32%
5.0.14862.10%
5.2.15771.88%
5.2.11741.81%
5.0.13691.68%
5.2.6641.56%
5.0.9631.54%
5.1.14621.51%
5.2.9591.44%
5.1.9591.44%
5.2.5491.20%
5.2.0471.15%
4.2.9451.10%
4.2.8451.10%
5.1.7441.07%
4.2431.05%
4.3.12421.03%
5.3421.03%
Other90522.09%

Merak (3,251 servers)

Version Number of Servers Percent
8.0.31,34841.46%
8.9.13049.35%
8.5.02026.21%
7.4.51935.94%
8.3.81364.18%
7.5.21354.15%
7.6.41304.00%
7.4.2571.75%
7.2.0481.48%
9.0.0471.45%
8.2.13471.45%
7.6.1461.41%
7.0.1361.11%
8.2.4341.05%
8.3.15331.02%
6.2.1331.02%
Other42212.98%

XMail (2,714 servers)

Version Number of Servers Percent
1.2574227.34%
1.2269125.46%
1.2440514.92%
1.2627810.24%
1.211696.23%
1.23863.17%
1.20823.02%
1.17742.73%
1.12662.43%
Other1214.46%

Qmail Toaster (1,814 servers)

Version Number of Servers Percent
1.31,61188.81%
1.21568.60%
1.0311.71%
Other160.88%

ArGoSoft (1,667 servers)

Version Number of Servers Percent
1.8 (1.8.9.5)31418.84%
1.8 (1.8.9.3)24014.40%
1.8 (1.8.9.6)23514.10%
1.8 (1.8.9.1)1619.66%
1.8 (1.8.8.8)1257.50%
1.8 (1.8.8.7)1136.78%
1.8 (1.8.9.2)724.32%
1.8 (1.8.9.4)482.88%
1.8 (1.8.8.9)372.22%
1.8 (1.8.8.1)321.92%
1.8 (1.8.6.0)311.86%
1.8 (1.8.9.0)281.68%
Other23113.86%

GroupWise (1,615 servers)

Version Number of Servers Percent
7.0.351932.14%
7.0.220312.57%
6.5.718211.27%
8.0.11227.55%
7.0.11066.56%
6.5.4955.88%
8.0.0925.70%
6.5.6664.09%
6.0.4543.34%
6.5.1452.79%
6.5.5321.98%
7.0181.11%
Other815.02%

SurgeSMTP (1,492 servers)

Version Number of Servers Percent
4.2a3-334523.12%
3.9e-129920.04%
4.0u4-415010.05%
3.8k4-4956.37%
3.9c-1442.95%
3.8i3-3422.82%
3.8f3-3402.68%
3.7b8-8382.55%
4.2d2-2332.21%
3.6f5-5322.14%
3.9g2-2312.08%
3.9h-65281.88%
3.8f2-2231.54%
3.5b3-3231.54%
4.2d-1191.27%
4.0u3-3171.14%
3.0c2-2151.01%
Other21814.61%

Trend Micro (1,289 servers)

Version Number of Servers Percent
5.762148.18%
5.536328.16%
5.1819314.97%
7.0886.83%
Other241.86%

Gordano Messaging Suite (GMS) (687 servers)

Version Number of Servers Percent
Other687100.00%

Post.Office (623 servers)

Version Number of Servers Percent
3.5.311418.30%
4.1.0.27211.56%
4.0.1558.83%
3.5.3J467.38%
3.8.3304.82%
4.1.0.4223.53%
3.9.2.3203.21%
3.1.2J182.89%
3.9.1182.89%
3.6.2172.73%
3.6.3162.57%
3.9.2152.41%
3.1.2132.09%
3.8.7.4132.09%
4.1.0.3121.93%
4.1121.93%
4.1.1111.77%
4.0.0.2111.77%
3.8.4101.61%
4.0.0.1101.61%
3.9.091.44%
3.9.2.181.28%
3.5.271.12%
3.9.1.371.12%
Other579.15%

Mirapoint (435 servers)

Version Number of Servers Percent
3.8.4-GA5011.49%
3.8.3-GA4610.57%
3.10.5-GA409.20%
3.10.7-GA409.20%
3.10.8-GA286.44%
3.10.4-GA276.21%
4.1.3-GA204.60%
3.10.6-GA194.37%
3.10.3-GA173.91%
3.8.2-GA143.22%
3.8.6-GA132.99%
3.8.7a132.99%
4.1.4-GA122.76%
3.8.5-GA122.76%
4.1.8-GA112.53%
3.7.5a-GA102.30%
4.1.6-GA92.07%
4.1.5-GA92.07%
4.0.5a81.84%
3.7.3a-GA71.61%
4.1.7a-GA71.61%
3.7.4b-GA51.15%
3.10.2-GA51.15%
Other132.99%

MagicMail (417 servers)

Version Number of Servers Percent
Other417100.00%

VisNetic (392 servers)

Version Number of Servers Percent
9.3.2.015439.29%
9.1.4.15113.01%
5.8.6.6205.10%
6.2.2.0133.32%
5.5.8.3123.06%
8.5.0.8123.06%
5.0.2.3112.81%
9.1.4.0112.81%
8.0.3.1102.55%
8.3.682.04%
5.4.5.482.04%
7.6.1.082.04%
7.2.4.182.04%
5.3.5.082.04%
8.0.3.071.79%
8.3.5.071.79%
8.0.361.53%
7.2.4.041.02%
Other348.67%

InterScan VirusWall (372 servers)

Version Number of Servers Percent
Other372100.00%

NetIQ MailMarshal (212 servers)

Version Number of Servers Percent
6.0.3.816075.47%
6.1.3.15157.08%
5.5.6.7146.60%
5.5.6.641.89%
5.5.6.541.89%
5.5.4.1641.89%
Other115.19%

Interscan (165 servers)

Version Number of Servers Percent
3.55 (build 1016)3118.79%
3.55 (build 1029)2112.73%
3.81-Build_10222012.12%
3.53 (build 2017)1710.30%
3.81-Build_1084127.27%
3.8-Build_3013116.67%
3.53 (build 1493)95.45%
3.53 (build 2011)95.45%
3.55 (build 1020)74.24%
3.53 (build 2013)63.64%
3.52 (build 1375)31.82%
3.53 (build 1494)21.21%
3.81-Build_105521.21%
3.8-Build_108021.21%
Other137.88%

WebSTAR V (105 servers)

Version Number of Servers Percent
5.4.13432.38%
5.4.02725.71%
5.3.42523.81%
5.3.298.57%
5.3.365.71%
5.3.121.90%
Other21.90%

Mercury (104 servers)

Version Number of Servers Percent
1.485250.00%
3.323028.85%
3.21c98.65%
1.4732.88%
3.2121.92%
3.01a21.92%
1.4921.92%
Other43.85%

Neon Mail Server (102 servers)

Version Number of Servers Percent
3.1.32625.49%
3.0.72019.61%
3.0.91211.76%
3.1.41110.78%
3.1.2109.80%
3.1.098.82%
3.1.565.88%
3.1.132.94%
3.0.821.96%
3.0.621.96%
Other10.98%

MessageWall (54 servers)

Version Number of Servers Percent
1.0.83564.81%
1.0.111629.63%
1.1.023.70%
1.0.611.85%
Other00.00%

ModusMail (40 servers)

Version Number of Servers Percent
4.35.477.01025.00%
4.35.480.0717.50%
3.1.302.0615.00%
4.2.420.0410.00%
4.1.361.2125.00%
3.2.315.025.00%
3.1.293.125.00%
4.35.480.1125.00%
4.2.425.2212.50%
4.1.361.012.50%
4.0.340.312.50%
4.3.459.012.50%
4.35.477.812.50%
Other00.00%

WebSTAR (38 servers)

Version Number of Servers Percent
Other38100.00%

MAILsweeper (29 servers)

Version Number of Servers Percent
4.3.20.0827.59%
4.3.14.0517.24%
4.3.17.0517.24%
4.3.1.0310.34%
4.2.10.026.90%
4.3.6.026.90%
4.3.19.013.45%
4.3.10.013.45%
4.3.12.013.45%
4.2.5.013.45%
Other00.00%

OpenVMS (26 servers)

Version Number of Servers Percent
8.31661.54%
7.3623.08%
8.227.69%
6.113.85%
7.213.85%
Other00.00%

OpenSMTPD (2 servers)

Version Number of Servers Percent
Other2100.00%




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