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Mail (MX) Server Survey
February 1st, 2009

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 Queried1,718,433   100.0%
Number of Servers that didn't respond268,26615.61%
    Server didn't open socket257,62414.99%
    Server didn't provide banner10,6420.62%
Server provided banner1,450,16784.39%
Server banner identifies software in use831,32148.38%

As indicated by the above table, of the 1,718,433 servers queried, only 831,321 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
Exim221,29526.62%
Sendmail185,96822.37%
Microsoft172,74720.78%
Postfix149,67818.00%
MailEnable24,5012.95%
MDaemon20,4502.46%
IMail16,7262.01%
Kerio5,6190.68%
Lotus Domino5,3270.64%
WinWebMail4,8640.59%
Merak4,2770.51%
CommuniGate Pro4,0780.49%
XMail2,4180.29%
GroupWise2,0510.25%
ArGoSoft1,9520.23%
Trend Micro1,8580.22%
Qmail Toaster1,6420.20%
SurgeSMTP1,4760.18%
Gordano Messaging Suite (GMS)7330.09%
Post.Office6450.08%
Mirapoint4990.06%
InterScan VirusWall4470.05%
VisNetic4100.05%
MagicMail3700.04%
NetIQ MailMarshal3520.04%
Interscan2800.03%
Neon Mail Server1480.02%
WebSTAR V1390.02%
Mercury1180.01%
ModusMail780.01%
MessageWall570.01%
WebSTAR520.01%
MAILsweeper440.01%
OpenVMS220.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (221,295 servers)

Version Number of Servers Percent
4.69163,88674.06%
4.6320,3619.20%
4.679,7694.41%
4.687,0303.18%
4.664,2251.91%
4.604,0401.83%
4.503,2661.48%
4.622,9001.31%
Other5,8182.63%

Sendmail (185,968 servers)

Version Number of Servers Percent
8.13.131,39316.88%
8.12.11.2006061419,00810.22%
8.13.818,72710.07%
8.13.617,9219.64%
8.12.11.2006030816,1188.67%
8.11.610,8995.86%
8.13.6.2006061410,2335.50%
8.12.109,0314.86%
8.12.118,3924.51%
8.14.17,6324.10%
8.14.36,2983.39%
8.14.26,0623.26%
8.13.44,8412.60%
8.13.74,1742.24%
8.12.83,7652.02%
8.9.32,1181.14%
8.10.21,8801.01%
Other7,4764.02%

Microsoft (172,747 servers)

Version Number of Servers Percent
6.0.3790.3959133,43577.24%
6.0.3790.183023,28213.48%
5.0.2195.671310,5976.13%
6.0.3790.2112,7451.59%
Other2,6881.56%

Postfix (149,678 servers)

Version Number of Servers Percent
Other149,678100.00%

MailEnable (24,501 servers)

Version Number of Servers Percent
1.981--4,84019.75%
1.986--4,08616.68%
1.983--3,04812.44%
1.96--1,1124.54%
1.95--1,0534.30%
1.9--8173.33%
0-3.6-6462.64%
1.8--6352.59%
0-3.14-5702.33%
0-2.37-5572.27%
0-3.53-5032.05%
--3.64541.85%
0-1.85-4411.80%
0-2.52-2911.19%
0-1.87-2871.17%
0--3.532861.17%
0-2.38-2671.09%
Other4,60818.81%

MDaemon (20,450 servers)

Version Number of Servers Percent
10.0.23,80618.61%
9.6.61,5557.60%
9.6.11,2716.22%
9.6.51,2486.10%
10.0.11,0495.13%
10.0.01,0455.11%
9.6.48184.00%
9.6.27093.47%
9.5.27073.46%
8.1.36933.39%
9.5.66513.18%
9.0.46062.96%
9.5.15492.68%
9.6.34242.07%
7.2.33911.91%
6.8.53661.79%
9.0.13281.60%
7.2.03031.48%
9.0.02591.27%
9.5.52561.25%
8.1.42421.18%
8.0.22241.10%
Other2,95014.43%

IMail (16,726 servers)

Version Number of Servers Percent
8.223,51521.02%
8.151,97011.78%
9.231,3608.13%
10.011,0826.47%
8.059825.87%
9.109725.81%
10.029485.67%
7.076293.76%
9.215743.43%
7.154862.91%
6.064262.55%
8.003832.29%
10.03612.16%
8.043311.98%
9.203221.93%
8.212971.78%
9.222761.65%
8.012251.35%
8.102021.21%
8.201791.07%
Other1,2067.21%

Kerio (5,619 servers)

Version Number of Servers Percent
6.5.284315.00%
6.6.067211.96%
6.6.162011.03%
6.5.05449.68%
6.6.25109.08%
6.4.14027.15%
6.5.13796.74%
6.3.13666.51%
6.4.22454.36%
6.4.02284.06%
6.3.01352.40%
Other67512.01%

Lotus Domino (5,327 servers)

Version Number of Servers Percent
8.0.25309.95%
7.0.25239.82%
8.0.14668.75%
7.0.33406.38%
6.5.42795.24%
7.0.12735.12%
6.5.12344.39%
6.5.32234.19%
7.0.2FP22134.00%
8.01943.64%
7.01933.62%
7.0.3FP11883.53%
6.5.51783.34%
6.51502.82%
7.0.2FP11072.01%
5.0.11891.67%
6.5.2891.67%
7.0.2FP3621.16%
6.5.6591.11%
5.0.13a571.07%
5.0.12561.05%
Other82415.47%

WinWebMail (4,864 servers)

Version Number of Servers Percent
3.7.6.11,23725.43%
3.7.3.11,04221.42%
3.7.1.158011.92%
3.7.7.355411.39%
3.7.5.13296.76%
3.6.3.13086.33%
3.7.0.52384.89%
3.7.7.12184.48%
3.7.0.71613.31%
3.7.0.31583.25%
Other390.80%

Merak (4,277 servers)

Version Number of Servers Percent
8.0.31,71840.17%
8.9.14169.73%
8.5.02596.06%
7.4.52235.21%
7.5.22054.79%
7.6.42024.72%
8.3.81824.26%
9.0.0872.03%
7.4.2821.92%
7.2.0661.54%
7.6.1641.50%
6.2.1611.43%
8.2.4541.26%
8.2.13461.08%
Other61214.31%

CommuniGate Pro (4,078 servers)

Version Number of Servers Percent
4.1.83278.02%
5.2.102526.18%
5.1.132175.32%
4.2.102014.93%
5.2.81694.14%
5.1.161523.73%
5.1.121483.63%
5.2.111333.26%
5.1.141243.04%
5.2.91132.77%
5.2.31082.65%
5.2.61072.62%
5.2.5932.28%
5.2.0902.21%
5.0.13882.16%
5.0.9852.08%
5.0.14771.89%
5.1.9691.69%
5.2.1621.52%
5.1.10591.45%
5.1.7591.45%
5.1.8571.40%
4.2.8551.35%
5.2.7551.35%
4.2551.35%
5.1.11541.32%
4.3.12491.20%
4.2.7461.13%
4.2.9451.10%
5.0.8421.03%
Other88721.75%

XMail (2,418 servers)

Version Number of Servers Percent
1.2268128.16%
1.2562225.72%
1.2444618.44%
1.212058.48%
1.17974.01%
1.20923.80%
1.23903.72%
1.12632.61%
1.16321.32%
Other903.72%

GroupWise (2,051 servers)

Version Number of Servers Percent
7.0.364731.55%
7.0.237418.24%
6.5.722811.12%
7.0.11818.82%
6.5.41356.58%
6.5.6944.58%
6.0.4803.90%
6.5.1562.73%
6.5.5542.63%
7.0452.19%
8.0.0371.80%
6.5.2211.02%
Other994.83%

ArGoSoft (1,952 servers)

Version Number of Servers Percent
1.8 (1.8.9.5)43922.49%
1.8 (1.8.9.3)30015.37%
1.8 (1.8.9.1)22111.32%
1.8 (1.8.8.8)1658.45%
1.8 (1.8.8.7)1457.43%
1.8 (1.8.9.2)944.82%
1.8 (1.8.9.4)562.87%
1.8 (1.8.9.6)562.87%
1.8 (1.8.8.9)492.51%
1.8 (1.8.8.1)412.10%
1.8 (1.8.9.0)341.74%
1.8 (1.8.6.0)311.59%
1.8 (1.8.8.2)251.28%
1.8 (1.8.7.5)221.13%
1.8 (1.8.5.9)201.02%
Other25413.01%

Trend Micro (1,858 servers)

Version Number of Servers Percent
5.790248.55%
5.559932.24%
5.1823212.49%
7.0945.06%
Other311.67%

Qmail Toaster (1,642 servers)

Version Number of Servers Percent
1.31,35482.46%
1.222813.89%
1.0432.62%
Other171.04%

SurgeSMTP (1,476 servers)

Version Number of Servers Percent
3.9e-148833.06%
3.9c-115610.57%
3.9g2-21379.28%
3.8k4-41369.21%
3.8f3-3734.95%
3.7b8-8614.13%
3.8i3-3493.32%
3.6f5-5473.18%
3.5b3-3392.64%
3.9h-65271.83%
3.8f2-2271.83%
3.0c2-2191.29%
3.8k2-2171.15%
Other20013.55%

Gordano Messaging Suite (GMS) (733 servers)

Version Number of Servers Percent
Other733100.00%

Post.Office (645 servers)

Version Number of Servers Percent
3.5.316826.05%
4.0.1568.68%
4.1.0.2507.75%
3.5.3J406.20%
3.8.3335.12%
3.6.3294.50%
3.1.2J223.41%
3.6.2213.26%
3.9.1213.26%
3.9.2.3203.10%
3.1.2172.64%
3.9.2162.48%
3.8.7.4142.17%
3.5.2111.71%
3.9.0111.71%
3.8.4101.55%
4.1101.55%
3.9.2.191.40%
3.9.1.391.40%
3.6.071.09%
3.8.571.09%
4.0.0.271.09%
Other578.84%

Mirapoint (499 servers)

Version Number of Servers Percent
3.8.4-GA7715.43%
3.8.3-GA7414.83%
3.8.6-GA5010.02%
3.8.7a438.62%
3.10.3-GA418.22%
3.7.5a-GA285.61%
3.8.5-GA285.61%
3.8.2-GA234.61%
3.7.3a-GA214.21%
3.10.2-GA183.61%
3.7.4b-GA183.61%
3.10.4-GA173.41%
4.1.3-GA91.80%
4.0.5a91.80%
3.7.5-GA61.20%
Other377.41%

InterScan VirusWall (447 servers)

Version Number of Servers Percent
Other447100.00%

VisNetic (410 servers)

Version Number of Servers Percent
9.1.4.18420.49%
9.3.2.07919.27%
8.5.0.8215.12%
5.8.6.6184.39%
5.0.2.3163.90%
7.2.4.1153.66%
8.0.3.0153.66%
5.5.8.3153.66%
9.1.4.0153.66%
8.0.3.1143.41%
6.2.2.0143.41%
8.3.5.0112.68%
5.3.5.0112.68%
7.6.1.0102.44%
5.4.5.492.20%
8.0.392.20%
8.3.692.20%
7.5.3.051.22%
6.0.9.051.22%
Other358.54%

MagicMail (370 servers)

Version Number of Servers Percent
Other370100.00%

NetIQ MailMarshal (352 servers)

Version Number of Servers Percent
6.0.3.827778.69%
5.5.6.7215.97%
6.1.3.15195.40%
5.5.6.692.56%
5.5.4.1661.70%
5.5.5.941.14%
5.5.5.641.14%
Other123.41%

Interscan (280 servers)

Version Number of Servers Percent
3.8-Build_30135318.93%
3.55 (build 1016)4616.43%
3.81-Build_10224315.36%
3.55 (build 1029)258.93%
3.53 (build 2017)207.14%
3.53 (build 2011)165.71%
3.53 (build 1493)134.64%
3.55 (build 1020)124.29%
3.81-Build_1084113.93%
3.53 (build 2013)103.57%
3.52 (build 1375)72.50%
3.8-Build_306531.07%
3.8-Build_108031.07%
Other186.43%

Neon Mail Server (148 servers)

Version Number of Servers Percent
3.1.34631.08%
3.0.72416.22%
3.0.92315.54%
3.1.21610.81%
3.1.01510.14%
3.1.4149.46%
3.1.132.03%
3.0.632.03%
3.0.821.35%
3.0.521.35%
Other00.00%

WebSTAR V (139 servers)

Version Number of Servers Percent
5.4.14330.94%
5.4.03625.90%
5.3.43223.02%
5.3.2139.35%
5.3.3139.35%
Other21.44%

Mercury (118 servers)

Version Number of Servers Percent
1.485647.46%
3.323731.36%
3.21c97.63%
1.4743.39%
3.3143.39%
3.2132.54%
1.4921.69%
Other32.54%

ModusMail (78 servers)

Version Number of Servers Percent
4.35.480.01721.79%
3.2.315.01519.23%
4.35.477.01012.82%
4.3.459.0911.54%
3.1.302.078.97%
4.35.480.1167.69%
4.1.361.2133.85%
4.2.425.422.56%
4.1.361.022.56%
4.2.425.2211.28%
4.2.420.011.28%
4.0.340.311.28%
4.0.330.811.28%
1.4.232.011.28%
3.1.293.111.28%
4.35.477.811.28%
Other00.00%

MessageWall (57 servers)

Version Number of Servers Percent
1.0.84070.18%
1.0.111424.56%
1.1.023.51%
1.0.611.75%
Other00.00%

WebSTAR (52 servers)

Version Number of Servers Percent
Other52100.00%

MAILsweeper (44 servers)

Version Number of Servers Percent
4.3.20.01227.27%
4.3.14.0715.91%
4.3.17.0613.64%
4.3.1.0613.64%
4.3.19.049.09%
4.2.10.049.09%
4.3.6.024.55%
4.3.10.012.27%
4.2.5.012.27%
4.1.5.012.27%
Other00.00%

OpenVMS (22 servers)

Version Number of Servers Percent
8.31254.55%
7.3522.73%
8.2313.64%
7.229.09%
Other00.00%




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