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Mail (MX) Server Survey
April 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 Queried1,925,462   100.0%
Number of Servers that didn't respond304,92715.84%
    Server didn't open socket292,84415.21%
    Server didn't provide banner12,0830.63%
Server provided banner1,620,53584.16%
Server banner identifies software in use923,00347.94%

As indicated by the above table, of the 1,925,462 servers queried, only 923,003 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
Exim248,29626.90%
Sendmail201,90121.87%
Microsoft195,67021.20%
Postfix167,04218.10%
MailEnable26,9652.92%
MDaemon22,6962.46%
IMail17,4351.89%
Kerio6,5210.71%
Lotus Domino5,9450.64%
WinWebMail5,0850.55%
CommuniGate Pro4,4090.48%
Merak4,2870.46%
XMail2,6340.29%
GroupWise2,1400.23%
ArGoSoft2,0340.22%
Trend Micro1,8830.20%
Qmail Toaster1,7870.19%
SurgeSMTP1,5700.17%
Gordano Messaging Suite (GMS)7900.09%
Post.Office7150.08%
Mirapoint5240.06%
InterScan VirusWall4690.05%
VisNetic4540.05%
MagicMail4100.04%
NetIQ MailMarshal3410.04%
Interscan2850.03%
Neon Mail Server1700.02%
WebSTAR V1390.02%
Mercury1350.01%
ModusMail740.01%
MessageWall650.01%
WebSTAR580.01%
MAILsweeper490.01%
OpenVMS250.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (248,296 servers)

Version Number of Servers Percent
4.69191,07076.95%
4.6319,2847.77%
4.6711,1864.51%
4.686,1482.48%
4.664,4551.79%
4.604,0901.65%
4.503,3231.34%
4.622,8501.15%
Other5,8902.37%

Sendmail (201,901 servers)

Version Number of Servers Percent
8.13.135,23917.45%
8.13.820,66010.23%
8.12.11.2006061420,48310.15%
8.13.618,3669.10%
8.12.11.2006030817,6558.74%
8.14.310,9635.43%
8.13.6.2006061410,9425.42%
8.11.69,8854.90%
8.12.109,4104.66%
8.12.119,1714.54%
8.14.17,2223.58%
8.14.26,6573.30%
8.13.45,0452.50%
8.13.74,4052.18%
8.12.83,9231.94%
8.9.32,2681.12%
Other9,6074.76%

Microsoft (195,670 servers)

Version Number of Servers Percent
6.0.3790.3959155,26879.35%
6.0.3790.183023,71912.12%
5.0.2195.671311,0705.66%
6.0.3790.2112,7251.39%
Other2,8881.48%

Postfix (167,042 servers)

Version Number of Servers Percent
Other167,042100.00%

MailEnable (26,965 servers)

Version Number of Servers Percent
1.986--5,45820.24%
1.981--4,97918.46%
1.983--3,16011.72%
1.96--1,1104.12%
1.95--1,0373.85%
0-3.6-1,0303.82%
1.9--8423.12%
1.8--6392.37%
0-2.37-5712.12%
0-3.14-5702.11%
--3.65061.88%
0-1.85-4271.58%
0-3.53-4051.50%
0-1.87-3431.27%
0-2.52-2901.08%
Other5,59820.76%

MDaemon (22,696 servers)

Version Number of Servers Percent
10.0.44,33619.10%
9.6.61,4456.37%
9.6.11,3265.84%
9.6.51,1935.26%
10.0.21,1435.04%
10.0.01,0974.83%
9.5.28023.53%
9.6.47713.40%
8.1.37263.20%
9.6.27253.19%
10.0.37203.17%
9.5.66853.02%
10.0.16542.88%
9.0.46222.74%
9.5.15842.57%
9.6.34421.95%
7.2.33941.74%
6.8.53851.70%
9.0.13191.41%
7.2.03181.40%
9.5.52591.14%
9.0.02581.14%
8.1.42331.03%
Other3,25914.36%

IMail (17,435 servers)

Version Number of Servers Percent
8.223,48820.01%
8.151,92111.02%
10.021,87910.78%
9.231,3837.93%
9.101,0486.01%
8.059805.62%
10.018254.73%
7.076463.71%
9.215693.26%
7.155082.91%
6.064252.44%
8.004052.32%
10.03231.85%
8.043191.83%
9.203081.77%
9.222941.69%
8.212861.64%
8.012121.22%
8.102091.20%
Other1,4078.07%

Kerio (6,521 servers)

Version Number of Servers Percent
6.6.21,83428.12%
6.5.275311.55%
6.5.05468.37%
6.6.05197.96%
6.6.14366.69%
6.4.13825.86%
6.3.13535.41%
6.5.13445.28%
6.4.02433.73%
6.4.22233.42%
6.3.01482.27%
6.1.3661.01%
6.2.0661.01%
Other6089.32%

Lotus Domino (5,945 servers)

Version Number of Servers Percent
7.0.25599.40%
8.0.24617.75%
8.0.14357.32%
7.0.33666.16%
8.53345.62%
7.0.13065.15%
6.5.42934.93%
6.5.12574.32%
7.0.2FP22394.02%
6.5.32363.97%
7.0.3FP12113.55%
6.5.51923.23%
7.01843.10%
8.01843.10%
6.51662.79%
7.0.2FP11061.78%
6.5.21031.73%
5.0.11991.67%
7.0.2FP3781.31%
6.5.6691.16%
5.0.12641.08%
Other1,00316.87%

WinWebMail (5,085 servers)

Version Number of Servers Percent
3.7.6.11,21923.97%
3.7.3.11,00519.76%
3.7.7.385316.77%
3.7.1.155510.91%
3.7.5.13366.61%
3.6.3.12985.86%
3.7.0.52374.66%
3.7.7.12214.35%
3.7.0.31633.21%
3.7.0.71522.99%
Other460.90%

CommuniGate Pro (4,409 servers)

Version Number of Servers Percent
5.2.123618.19%
4.1.83327.53%
5.1.132255.10%
4.2.102094.74%
5.2.81854.20%
5.1.161774.01%
5.2.101643.72%
5.1.121483.36%
5.2.111433.24%
5.2.31202.72%
5.1.141152.61%
5.2.9992.25%
5.2.6982.22%
5.0.13942.13%
5.0.9932.11%
5.0.14882.00%
5.2.0851.93%
5.2.5841.91%
5.1.9751.70%
5.2.1631.43%
5.1.10581.32%
5.1.7571.29%
4.2561.27%
5.1.11541.22%
5.2.7531.20%
5.1.8511.16%
4.2.8511.16%
4.2.9501.13%
Other1,02123.16%

Merak (4,287 servers)

Version Number of Servers Percent
8.0.31,75841.01%
8.9.14039.40%
8.5.02666.20%
7.4.52225.18%
7.6.41994.64%
7.5.21914.46%
8.3.81914.46%
7.4.2902.10%
9.0.0841.96%
7.2.0641.49%
7.6.1571.33%
8.2.13531.24%
8.2.4521.21%
6.2.1521.21%
Other60514.11%

XMail (2,634 servers)

Version Number of Servers Percent
1.2574028.09%
1.2271327.07%
1.2448218.30%
1.212097.93%
1.171013.83%
1.20983.72%
1.23913.45%
1.12672.54%
1.16311.18%
Other1023.87%

GroupWise (2,140 servers)

Version Number of Servers Percent
7.0.369932.66%
7.0.237217.38%
6.5.724611.50%
7.0.11647.66%
6.5.41316.12%
6.5.6924.30%
6.0.4813.79%
8.0.0773.60%
6.5.1632.94%
7.0472.20%
6.5.5472.20%
Other1215.65%

ArGoSoft (2,034 servers)

Version Number of Servers Percent
1.8 (1.8.9.5)43221.24%
1.8 (1.8.9.3)30314.90%
1.8 (1.8.9.1)22911.26%
1.8 (1.8.8.8)1577.72%
1.8 (1.8.8.7)1527.47%
1.8 (1.8.9.6)1205.90%
1.8 (1.8.9.2)984.82%
1.8 (1.8.9.4)592.90%
1.8 (1.8.8.9)512.51%
1.8 (1.8.8.1)391.92%
1.8 (1.8.9.0)341.67%
1.8 (1.8.6.0)311.52%
1.8 (1.8.8.2)271.33%
Other30214.85%

Trend Micro (1,883 servers)

Version Number of Servers Percent
5.787846.63%
5.560031.86%
5.1827514.60%
7.0965.10%
Other341.81%

Qmail Toaster (1,787 servers)

Version Number of Servers Percent
1.31,51784.89%
1.219911.14%
1.0462.57%
1.5191.06%
Other60.34%

SurgeSMTP (1,570 servers)

Version Number of Servers Percent
3.9e-154934.97%
3.9c-11529.68%
3.8k4-41449.17%
3.9g2-21318.34%
3.8f3-3613.89%
3.7b8-8613.89%
3.8i3-3462.93%
3.6f5-5422.68%
3.5b3-3402.55%
4.0a-1392.48%
3.8f2-2311.97%
3.9h-65251.59%
3.0c2-2211.34%
3.8k2-2161.02%
Other21213.50%

Gordano Messaging Suite (GMS) (790 servers)

Version Number of Servers Percent
Other790100.00%

Post.Office (715 servers)

Version Number of Servers Percent
3.5.316623.22%
4.0.1709.79%
4.1.0.2648.95%
3.5.3J446.15%
3.8.3375.17%
3.6.3283.92%
3.9.2.3243.36%
3.9.1233.22%
3.1.2J223.08%
3.6.2223.08%
3.9.2202.80%
3.1.2182.52%
3.5.2131.82%
3.9.0131.82%
3.8.7.4121.68%
3.8.4111.54%
4.0.0.2111.54%
3.9.2.1111.54%
4.1111.54%
3.9.1.391.26%
4.0.0.191.26%
4.0.1.181.12%
3.8.581.12%
Other618.53%

Mirapoint (524 servers)

Version Number of Servers Percent
3.8.4-GA8916.98%
3.8.3-GA6812.98%
3.10.4-GA428.02%
3.8.6-GA428.02%
3.8.7a397.44%
3.10.3-GA336.30%
3.7.5a-GA275.15%
3.8.5-GA224.20%
3.8.2-GA214.01%
4.1.3-GA214.01%
3.7.3a-GA214.01%
3.7.4b-GA163.05%
3.10.2-GA152.86%
4.0.5a152.86%
4.1.4-GA132.48%
Other407.63%

InterScan VirusWall (469 servers)

Version Number of Servers Percent
Other469100.00%

VisNetic (454 servers)

Version Number of Servers Percent
9.3.2.011825.99%
9.1.4.17115.64%
5.8.6.6224.85%
7.2.4.1224.85%
8.5.0.8214.63%
5.0.2.3163.52%
6.2.2.0153.30%
5.5.8.3153.30%
8.0.3.0143.08%
8.0.3.1143.08%
9.1.4.0143.08%
5.3.5.0122.64%
8.0.3112.42%
8.3.5.0102.20%
5.4.5.491.98%
7.6.1.091.98%
8.3.691.98%
5.8.6.461.32%
6.0.9.051.10%
7.5.3.051.10%
Other367.93%

MagicMail (410 servers)

Version Number of Servers Percent
Other410100.00%

NetIQ MailMarshal (341 servers)

Version Number of Servers Percent
6.0.3.826978.89%
6.1.3.15205.87%
5.5.6.7174.99%
5.5.4.1672.05%
5.5.6.651.47%
5.5.5.951.47%
5.5.6.551.47%
5.5.5.641.17%
Other92.64%

Interscan (285 servers)

Version Number of Servers Percent
3.8-Build_30135418.95%
3.55 (build 1016)5218.25%
3.81-Build_10223813.33%
3.55 (build 1029)279.47%
3.53 (build 2017)186.32%
3.53 (build 2011)144.91%
3.53 (build 1493)124.21%
3.81-Build_1084124.21%
3.55 (build 1020)113.86%
3.53 (build 2013)103.51%
3.52 (build 1375)72.46%
3.8-Build_306531.05%
3.51 (build 1337)31.05%
3.8-Build_108031.05%
Other217.37%

Neon Mail Server (170 servers)

Version Number of Servers Percent
3.1.34425.88%
3.1.42917.06%
3.0.72917.06%
3.0.92414.12%
3.1.21710.00%
3.1.0158.82%
3.1.552.94%
3.0.831.76%
3.1.121.18%
Other21.18%

WebSTAR V (139 servers)

Version Number of Servers Percent
5.4.14532.37%
5.4.03827.34%
5.3.43122.30%
5.3.2128.63%
5.3.3107.19%
Other32.16%

Mercury (135 servers)

Version Number of Servers Percent
1.486245.93%
3.324331.85%
3.21c107.41%
1.4753.70%
3.3153.70%
1.4421.48%
3.2121.48%
3.01a21.48%
1.4921.48%
Other21.48%

ModusMail (74 servers)

Version Number of Servers Percent
3.2.315.01520.27%
4.35.480.01114.86%
4.35.477.0912.16%
4.35.480.11810.81%
3.1.302.079.46%
4.2.420.068.11%
4.3.459.056.76%
4.1.361.2134.05%
4.2.425.422.70%
3.1.293.122.70%
4.2.425.2211.35%
4.1.361.011.35%
4.0.340.311.35%
4.0.330.811.35%
1.4.232.011.35%
4.35.477.811.35%
Other00.00%

MessageWall (65 servers)

Version Number of Servers Percent
1.0.84772.31%
1.0.111523.08%
1.1.023.08%
1.0.611.54%
Other00.00%

WebSTAR (58 servers)

Version Number of Servers Percent
Other58100.00%

MAILsweeper (49 servers)

Version Number of Servers Percent
4.3.20.01530.61%
4.3.14.0714.29%
4.3.17.0612.24%
4.2.10.0510.20%
4.3.1.0510.20%
4.3.19.036.12%
4.3.6.036.12%
4.3.10.024.08%
4.2.1.012.04%
4.2.5.012.04%
4.1.5.012.04%
Other00.00%

OpenVMS (25 servers)

Version Number of Servers Percent
8.31560.00%
7.3416.00%
8.2312.00%
7.228.00%
6.114.00%
Other00.00%




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