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Mail (MX) Server Survey
July 1st, 2012

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 Queried2,397,082   100.0%
Number of Servers that didn't respond399,83516.68%
    Server didn't open socket387,80216.18%
    Server didn't provide banner12,0330.50%
Server provided banner1,997,24783.32%
Server banner identifies software in use1,090,43645.49%

As indicated by the above table, of the 2,397,082 servers queried, only 1,090,436 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
Exim500,94045.94%
Postfix264,77024.28%
Sendmail125,69411.53%
Microsoft111,90810.26%
MailEnable33,8103.10%
MDaemon21,3001.95%
IMail8,1880.75%
Lotus Domino4,7750.44%
WinWebMail3,6720.34%
CommuniGate Pro3,2990.30%
XMail2,2810.21%
Kerio1,8590.17%
Qmail Toaster1,6430.15%
Merak1,4290.13%
SurgeSMTP1,0920.10%
ArGoSoft8570.08%
GroupWise6260.06%
Trend Micro4040.04%
Post.Office3920.04%
Gordano Messaging Suite (GMS)3760.03%
MagicMail3270.03%
Mirapoint1870.02%
VisNetic1520.01%
InterScan VirusWall1430.01%
Mercury590.01%
Interscan540.00%
NetIQ MailMarshal440.00%
WebSTAR V340.00%
Neon Mail Server300.00%
MessageWall200.00%
OpenVMS200.00%
OpenSMTPD180.00%
ModusMail130.00%
WebSTAR120.00%
MAILsweeper80.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (500,940 servers)

Version Number of Servers Percent
4.77343,06968.49%
4.6964,59412.89%
4.7642,5388.49%
4.7221,9374.38%
4.676,9731.39%
4.635,3721.07%
Other16,4573.29%

Postfix (264,770 servers)

Version Number of Servers Percent
Other264,770100.00%

Sendmail (125,694 servers)

Version Number of Servers Percent
8.13.833,32226.51%
8.13.119,74315.71%
8.14.316,72913.31%
8.14.512,1499.67%
8.14.411,1618.88%
8.12.11.200603085,0774.04%
8.13.6.200606144,0113.19%
8.14.23,7302.97%
8.11.62,6442.10%
8.12.102,3721.89%
8.14.12,1081.68%
8.13.61,9641.56%
8.12.11.200606141,6791.34%
8.13.71,6761.33%
8.12.111,4311.14%
Other5,8984.69%

Microsoft (111,908 servers)

Version Number of Servers Percent
6.0.3790.467589,32279.82%
6.0.3790.395913,43912.01%
6.0.3790.18303,6693.28%
7.5.7601.175141,3111.17%
5.0.2195.73811,2731.14%
Other2,8942.59%

MailEnable (33,810 servers)

Version Number of Servers Percent
1.986--8,21524.30%
5.10--2,5897.66%
4.26--2,4967.38%
1.981--1,5474.58%
6.0--1,0423.08%
1.983--9652.85%
6.03--8202.43%
0-3.63-7822.31%
5.51--7002.07%
3.62--6862.03%
5.11--6281.86%
6.53--4201.24%
4.22--3971.17%
0-4.26-3871.14%
0-1.87-3851.14%
0-6.03-3651.08%
4.23--3571.06%
Other11,02932.62%

MDaemon (21,300 servers)

Version Number of Servers Percent
12.5.62,62612.33%
11.0.32,54811.96%
12.5.41,5377.22%
11.0.01,3346.26%
10.0.08804.13%
10.1.28263.88%
12.5.38203.85%
10.1.17053.31%
12.0.36122.87%
9.6.15422.54%
12.5.24972.33%
9.6.64862.28%
10.1.04672.19%
12.0.44342.04%
12.5.53501.64%
9.5.23341.57%
9.6.23241.52%
9.6.53201.50%
10.0.53111.46%
9.5.12691.26%
10.0.22691.26%
9.5.62641.24%
9.6.42471.16%
12.0.12471.16%
8.1.32331.09%
12.0.02321.09%
12.5.12241.05%
Other3,36215.78%

IMail (8,188 servers)

Version Number of Servers Percent
8.221,54618.88%
11.51,34016.37%
11.035146.28%
9.235066.18%
8.155056.17%
11.014195.12%
8.053284.01%
12.0.0.3842863.49%
10.022633.21%
12.0.0.3482412.94%
11.02222.71%
7.072092.55%
11.021832.23%
6.061501.83%
8.001431.75%
7.151411.72%
10.011401.71%
9.211001.22%
9.10891.09%
Other86310.54%

Lotus Domino (4,775 servers)

Version Number of Servers Percent
8.5.380416.84%
8.5.24018.40%
8.5.2FP23056.39%
8.5.12635.51%
8.5.3FP12415.05%
7.0.22094.38%
8.51823.81%
8.5.2FP31723.60%
8.5.2FP11252.62%
7.0.31242.60%
8.5.1FP51032.16%
7.0.11022.14%
8.0.1982.05%
8.0.2951.99%
8.5.2FP4931.95%
6.5.1881.84%
6.5.4871.82%
6.5.3761.59%
7.0761.59%
8.0681.42%
8.5.1FP4581.21%
7.0.3FP1571.19%
8.5.1FP3561.17%
6.5531.11%
6.5.5521.09%
Other78716.48%

WinWebMail (3,672 servers)

Version Number of Servers Percent
3.8.1.376020.70%
3.8.0.154414.81%
3.7.6.142111.47%
3.8.1.538110.38%
3.7.3.13008.17%
3.7.7.32797.60%
3.8.1.12717.38%
3.8.2.11564.25%
3.7.1.11534.17%
3.7.5.1992.70%
3.6.3.1721.96%
3.7.7.1641.74%
3.7.0.3551.50%
3.7.0.5511.39%
3.7.0.7471.28%
Other190.52%

CommuniGate Pro (3,299 servers)

Version Number of Servers Percent
5.1.162597.85%
5.4.42066.24%
5.4.52056.21%
4.1.81544.67%
5.2.201193.61%
5.4.11073.24%
5.3.131003.03%
5.4.2882.67%
4.2.10832.52%
5.2.16832.52%
5.4.3822.49%
5.1.12702.12%
5.0.14672.03%
5.2.3641.94%
5.2.19621.88%
5.3.15591.79%
5.4.0541.64%
5.2.14531.61%
5.3.8501.52%
5.2.12491.49%
5.3.12471.42%
5.3.9441.33%
5.3.10431.30%
5.1.13411.24%
5.4391.18%
5.2.13371.12%
5.2.8351.06%
Other99930.28%

XMail (2,281 servers)

Version Number of Servers Percent
1.2753523.45%
1.2252623.06%
1.2543519.07%
1.2626711.71%
1.242018.81%
1.21863.77%
1.23532.32%
1.20421.84%
1.17331.45%
1.12231.01%
Other803.51%

Kerio (1,859 servers)

Version Number of Servers Percent
6.7.328715.44%
6.6.21859.95%
6.7.01668.93%
6.5.01347.21%
6.5.21306.99%
6.7.21075.76%
6.4.11075.76%
6.7.1975.22%
6.3.1844.52%
6.4.0733.93%
6.6.0713.82%
6.5.1653.50%
6.6.1623.34%
6.4.2412.21%
6.3.0361.94%
6.2.0231.24%
6.0.10201.08%
Other1719.20%

Qmail Toaster (1,643 servers)

Version Number of Servers Percent
1.31,55894.83%
1.2543.29%
Other311.89%

Merak (1,429 servers)

Version Number of Servers Percent
8.0.358240.73%
8.9.115110.57%
8.5.01037.21%
7.5.2634.41%
7.6.4624.34%
8.3.8594.13%
7.4.5553.85%
9.0.0271.89%
7.4.2231.61%
8.2.4201.40%
7.0.1191.33%
7.2.0191.33%
8.9.0191.33%
8.3.15181.26%
7.6.1181.26%
6.2.1181.26%
4.4.2161.12%
Other15710.99%

SurgeSMTP (1,092 servers)

Version Number of Servers Percent
5.3h2-220318.59%
5.2a-112711.63%
6.0a5-511510.53%
3.9e-1777.05%
6.0a4-4746.78%
3.8k4-4353.21%
4.0u4-4312.84%
5.0e4-4242.20%
5.3h-1211.92%
4.2d2-2201.83%
3.8i3-3191.74%
4.3g2-2191.74%
5.0e3-3151.37%
3.9h-18151.37%
3.7b8-8141.28%
3.6f5-5141.28%
4.2d4-4141.28%
6.0a3-3131.19%
5.1c2-2121.10%
3.9c-1121.10%
4.2a3-3121.10%
4.3g4-4121.10%
Other19417.77%

ArGoSoft (857 servers)

Version Number of Servers Percent
1.8 (1.8.9.6)21024.50%
1.8 (1.8.9.5)12614.70%
1.8 (1.8.9.3)10912.72%
1.8 (1.8.9.1)799.22%
1.8 (1.8.8.8)576.65%
1.8 (1.8.8.7)505.83%
1.8 (1.8.9.2)323.73%
1.8 (1.8.9.4)242.80%
1.8 (1.8.6.0)192.22%
1.8 (1.8.8.1)141.63%
1.8 (1.8.8.9)131.52%
1.8 (1.8.9.0)101.17%
Other11413.30%

GroupWise (626 servers)

Version Number of Servers Percent
8.0.215023.96%
7.0.312319.65%
6.5.77111.34%
7.0.4477.51%
7.0.2396.23%
8.0.1304.79%
6.5.4253.99%
7.0.1233.67%
6.5.6213.35%
6.5.1172.72%
6.0.4142.24%
8.0.0121.92%
6.5.5111.76%
12.0.0111.76%
7.071.12%
Other253.99%

Trend Micro (404 servers)

Version Number of Servers Percent
5.716240.10%
5.510325.50%
5.187117.57%
7.0389.41%
7.1194.70%
Other112.72%

Post.Office (392 servers)

Version Number of Servers Percent
3.5.35814.80%
4.1.0.24010.20%
4.0.1297.40%
4.1.2.4235.87%
3.9.2.3164.08%
4.1.1164.08%
3.5.3J153.83%
3.8.3133.32%
4.2123.06%
3.9.2112.81%
4.1.0.3102.55%
3.1.2102.55%
3.8.7.492.30%
4.0.1.192.30%
3.1.2J92.30%
4.1.0.482.04%
4.1.2.371.79%
4.2.1.171.79%
3.6.271.79%
4.1.2.261.53%
3.9.161.53%
3.9.1.261.53%
4.2.161.53%
3.5.151.28%
4.2.1.241.02%
3.5.241.02%
3.9.2.241.02%
4.141.02%
3.9.2.141.02%
4.0.0.141.02%
3.9.1.341.02%
Other266.63%

Gordano Messaging Suite (GMS) (376 servers)

Version Number of Servers Percent
Other376100.00%

MagicMail (327 servers)

Version Number of Servers Percent
Other327100.00%

Mirapoint (187 servers)

Version Number of Servers Percent
3.10.10a-GA2010.70%
4.2.3-GA168.56%
4.1.10-GA158.02%
3.10.5-GA126.42%
3.8.4-GA115.88%
3.10.9-GA115.88%
4.1.3-GA105.35%
4.1.9-GA94.81%
3.10.8-GA73.74%
4.3.3-GA63.21%
3.10.7-GA63.21%
3.8.3-GA63.21%
4.1.4-GA63.21%
3.8.5-GA52.67%
4.1.8-GA52.67%
4.2.4-GA52.67%
3.8.6-GA42.14%
3.7.5a-GA31.60%
3.8.7a31.60%
3.10.3-GA31.60%
3.10.4-GA31.60%
4.1.5-GA31.60%
4.3.4-GA21.07%
4.3.1a-FCS21.07%
4.0.5a21.07%
3.7.1-GA21.07%
Other105.35%

VisNetic (152 servers)

Version Number of Servers Percent
9.3.2.04328.29%
9.1.4.12214.47%
8.5.0.8117.24%
5.8.6.674.61%
5.5.8.374.61%
8.0.3.163.95%
7.6.1.063.95%
8.0.353.29%
6.2.2.042.63%
8.0.3.042.63%
7.2.4.142.63%
5.3.5.042.63%
5.4.5.431.97%
9.1.4.031.97%
5.0.2.331.97%
6.0.9.021.32%
5.0.2.121.32%
8.3.0.121.32%
8.3.5.021.32%
Other127.89%

InterScan VirusWall (143 servers)

Version Number of Servers Percent
Other143100.00%

Mercury (59 servers)

Version Number of Servers Percent
1.483254.24%
3.321525.42%
3.2123.39%
3.01a23.39%
1.4723.39%
3.21c23.39%
3.3023.39%
1.4411.69%
4.x11.69%
Other00.00%

Interscan (54 servers)

Version Number of Servers Percent
3.55 (build 1016)1222.22%
3.81-Build_10221018.52%
3.55 (build 1029)712.96%
3.53 (build 2017)47.41%
3.8-Build_301347.41%
3.53 (build 1493)35.56%
3.53 (build 2011)35.56%
3.81-Build_108435.56%
3.53 (build 2013)23.70%
3.81-Build_105511.85%
3.5 (build 1294)11.85%
3.51 (build 1337)11.85%
3.55 (build 1020)11.85%
3.8-Build_304511.85%
3.8-Build_108011.85%
Other00.00%

NetIQ MailMarshal (44 servers)

Version Number of Servers Percent
6.0.3.82863.64%
5.5.6.7511.36%
5.5.6.524.55%
5.5.6.624.55%
6.1.3.1524.55%
5.5.5.612.27%
5.5.5.912.27%
5.5.4.1712.27%
5.5.4.1612.27%
5.5.3.1712.27%
Other00.00%

WebSTAR V (34 servers)

Version Number of Servers Percent
5.4.11647.06%
5.4.0926.47%
5.3.3411.76%
5.3.438.82%
5.3.225.88%
Other00.00%

Neon Mail Server (30 servers)

Version Number of Servers Percent
3.0.7723.33%
3.1.3620.00%
3.1.4413.33%
3.1.0413.33%
3.1.2310.00%
3.0.926.67%
3.1.113.33%
3.0.813.33%
3.1.513.33%
3.0.613.33%
Other00.00%

MessageWall (20 servers)

Version Number of Servers Percent
1.0.81995.00%
1.0.615.00%
Other00.00%

OpenVMS (20 servers)

Version Number of Servers Percent
8.3840.00%
7.3525.00%
8.4420.00%
6.115.00%
7.215.00%
8.215.00%
Other00.00%

OpenSMTPD (18 servers)

Version Number of Servers Percent
Other18100.00%

ModusMail (13 servers)

Version Number of Servers Percent
4.35.477.0538.46%
4.35.480.0215.38%
4.1.361.2117.69%
3.2.315.017.69%
4.0.340.317.69%
4.3.459.017.69%
4.35.477.817.69%
3.1.302.017.69%
Other00.00%

WebSTAR (12 servers)

Version Number of Servers Percent
Other12100.00%

MAILsweeper (8 servers)

Version Number of Servers Percent
4.3.17.0337.50%
4.3.20.0225.00%
4.3.19.0225.00%
4.3.1.0112.50%
Other00.00%




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