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Mail (MX) Server Survey
June 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 Queried1,861,186   100.0%
Number of Servers that didn't respond298,36616.03%
    Server didn't open socket286,49015.39%
    Server didn't provide banner11,8760.64%
Server provided banner1,562,82083.97%
Server banner identifies software in use886,23947.62%

As indicated by the above table, of the 1,861,186 servers queried, only 886,239 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
Exim246,88527.86%
Sendmail186,39021.03%
Microsoft183,63720.72%
Postfix164,84718.60%
MailEnable26,2912.97%
MDaemon21,6532.44%
IMail16,3181.84%
Kerio6,3930.72%
Lotus Domino5,5280.62%
WinWebMail4,7850.54%
CommuniGate Pro4,1000.46%
Merak3,9500.45%
XMail2,5440.29%
GroupWise1,9090.22%
ArGoSoft1,8940.21%
Qmail Toaster1,7490.20%
Trend Micro1,5920.18%
SurgeSMTP1,5280.17%
Gordano Messaging Suite (GMS)7290.08%
Post.Office6550.07%
Mirapoint4890.06%
InterScan VirusWall4200.05%
VisNetic4170.05%
MagicMail3570.04%
NetIQ MailMarshal2930.03%
Interscan2470.03%
Neon Mail Server1530.02%
WebSTAR V1280.01%
Mercury1200.01%
ModusMail660.01%
MessageWall570.01%
WebSTAR460.01%
MAILsweeper460.01%
OpenVMS230.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (246,885 servers)

Version Number of Servers Percent
4.69194,71978.87%
4.6316,7506.78%
4.6711,7564.76%
4.684,8591.97%
4.664,1931.70%
4.603,6571.48%
4.502,8451.15%
4.622,7211.10%
Other5,3852.18%

Sendmail (186,390 servers)

Version Number of Servers Percent
8.13.133,66918.06%
8.13.820,04310.75%
8.12.11.2006061418,1629.74%
8.12.11.2006030816,2198.70%
8.13.614,2377.64%
8.14.313,2777.12%
8.13.6.2006061410,4405.60%
8.12.108,3354.47%
8.11.68,0874.34%
8.12.118,0224.30%
8.14.16,7753.63%
8.14.26,3143.39%
8.13.44,4672.40%
8.13.74,1222.21%
8.12.83,5311.89%
8.9.32,0631.11%
Other8,6274.63%

Microsoft (183,637 servers)

Version Number of Servers Percent
6.0.3790.3959149,28281.29%
6.0.3790.183019,85710.81%
5.0.2195.67139,6385.25%
6.0.3790.2112,2761.24%
Other2,5841.41%

Postfix (164,847 servers)

Version Number of Servers Percent
Other164,847100.00%

MailEnable (26,291 servers)

Version Number of Servers Percent
1.986--5,75721.90%
1.981--4,52117.20%
1.983--2,87810.95%
1.96--9483.61%
1.95--9423.58%
3.62--8153.10%
0-3.6-7762.95%
0-3.61-7442.83%
1.9--7412.82%
1.8--5432.07%
--3.615131.95%
0-2.37-4751.81%
0-3.14-4681.78%
--3.63671.40%
0-1.87-3621.38%
0-1.85-3571.36%
0-2.53-3291.25%
0-3.53-3221.22%
Other4,43316.86%

MDaemon (21,653 servers)

Version Number of Servers Percent
10.0.53,74317.29%
10.0.42,1549.95%
9.6.11,2105.59%
9.6.61,2075.57%
10.0.01,1695.40%
9.6.59384.33%
10.0.28043.71%
9.5.27483.45%
9.6.46543.02%
8.1.36462.98%
9.6.26422.96%
9.5.66082.81%
9.0.45502.54%
9.5.15482.53%
10.0.14011.85%
10.0.33931.81%
9.6.33741.73%
7.2.33441.59%
6.8.53391.57%
7.2.03021.39%
9.0.12921.35%
9.5.52541.17%
9.0.02231.03%
8.1.42221.03%
Other2,88813.34%

IMail (16,318 servers)

Version Number of Servers Percent
8.223,22619.77%
10.021,83711.26%
8.151,69010.36%
9.231,2737.80%
8.058685.32%
9.107034.31%
7.075933.63%
9.205813.56%
10.015543.40%
9.214963.04%
7.154442.72%
6.063942.41%
11.03822.34%
8.003782.32%
9.223732.29%
8.043031.86%
8.212851.75%
10.02781.70%
8.101991.22%
8.011991.22%
8.201651.01%
Other1,0976.72%

Kerio (6,393 servers)

Version Number of Servers Percent
6.6.22,47538.71%
6.5.25889.20%
6.5.04446.95%
6.6.04096.40%
6.4.13335.21%
6.6.13245.07%
6.3.12854.46%
6.5.12804.38%
6.4.02213.46%
6.4.21892.96%
6.3.01282.00%
Other71711.22%

Lotus Domino (5,528 servers)

Version Number of Servers Percent
8.55469.88%
7.0.25039.10%
8.0.23967.16%
8.0.13586.48%
7.0.33446.22%
7.0.12704.88%
6.5.42554.61%
6.5.12234.03%
7.0.3FP12093.78%
7.0.2FP22033.67%
6.5.31953.53%
6.5.51713.09%
7.01693.06%
8.01592.88%
6.51492.70%
5.0.11851.54%
7.0.2FP1841.52%
6.5.2801.45%
8.0.2FP1711.28%
7.0.2FP3711.28%
6.5.6601.09%
Other92716.77%

WinWebMail (4,785 servers)

Version Number of Servers Percent
3.7.6.11,08122.59%
3.7.3.188818.56%
3.7.7.380616.84%
3.7.1.14719.84%
3.7.5.13036.33%
3.8.0.12886.02%
3.6.3.12354.91%
3.7.7.12054.28%
3.7.0.51893.95%
3.7.0.31483.09%
3.7.0.71292.70%
Other420.88%

CommuniGate Pro (4,100 servers)

Version Number of Servers Percent
4.1.83027.37%
5.2.132756.71%
5.2.122325.66%
5.1.131934.71%
4.2.101794.37%
5.1.161724.20%
5.2.81483.61%
5.2.101333.24%
5.1.121243.02%
5.2.141122.73%
5.2.31072.61%
5.1.141012.46%
5.2.111012.46%
5.0.13892.17%
5.0.9801.95%
5.2.6791.93%
5.0.14741.80%
5.2.5741.80%
5.2.9691.68%
5.2.0691.68%
5.1.9561.37%
4.2.8521.27%
5.1.7501.22%
5.1.10481.17%
4.2481.17%
5.2.1471.15%
5.2.7471.15%
4.2.9451.10%
5.1.8451.10%
5.1.11441.07%
4.3.12421.02%
Other86321.05%

Merak (3,950 servers)

Version Number of Servers Percent
8.0.31,65341.85%
8.9.13579.04%
8.5.02536.41%
7.4.52175.49%
7.6.41724.35%
7.5.21704.30%
8.3.81644.15%
7.4.2822.08%
9.0.0711.80%
7.2.0601.52%
7.6.1531.34%
8.2.4481.22%
6.2.1471.19%
8.2.13441.11%
Other55914.15%

XMail (2,544 servers)

Version Number of Servers Percent
1.2576229.95%
1.2269327.24%
1.2444717.57%
1.211877.35%
1.17863.38%
1.20863.38%
1.23843.30%
1.12602.36%
1.16271.06%
Other1124.40%

GroupWise (1,909 servers)

Version Number of Servers Percent
7.0.364934.00%
7.0.229615.51%
6.5.723112.10%
7.0.11437.49%
6.5.41176.13%
8.0.0985.13%
6.5.6844.40%
6.0.4653.40%
6.5.1502.62%
6.5.5381.99%
7.0341.78%
Other1045.45%

ArGoSoft (1,894 servers)

Version Number of Servers Percent
1.8 (1.8.9.5)37419.75%
1.8 (1.8.9.3)28114.84%
1.8 (1.8.9.1)21811.51%
1.8 (1.8.9.6)1548.13%
1.8 (1.8.8.7)1407.39%
1.8 (1.8.8.8)1407.39%
1.8 (1.8.9.2)914.80%
1.8 (1.8.9.4)512.69%
1.8 (1.8.8.9)462.43%
1.8 (1.8.8.1)402.11%
1.8 (1.8.9.0)301.58%
1.8 (1.8.6.0)251.32%
1.8 (1.8.8.2)241.27%
1.8 (1.8.5.9)201.06%
Other26013.73%

Qmail Toaster (1,749 servers)

Version Number of Servers Percent
1.31,49785.59%
1.218810.75%
1.0432.46%
Other211.20%

Trend Micro (1,592 servers)

Version Number of Servers Percent
5.774046.48%
5.549030.78%
5.1824415.33%
7.0895.59%
Other291.82%

SurgeSMTP (1,528 servers)

Version Number of Servers Percent
3.9e-154135.41%
3.9c-11399.10%
3.8k4-41298.44%
3.9g2-21258.18%
3.7b8-8583.80%
3.8f3-3533.47%
3.8i3-3483.14%
3.6f5-5402.62%
3.5b3-3362.36%
3.8f2-2261.70%
3.9h-65251.64%
3.0c2-2201.31%
4.0o-1181.18%
4.0q-1181.18%
Other25216.49%

Gordano Messaging Suite (GMS) (729 servers)

Version Number of Servers Percent
Other729100.00%

Post.Office (655 servers)

Version Number of Servers Percent
3.5.315123.05%
4.1.0.2629.47%
4.0.1599.01%
3.5.3J436.56%
3.8.3355.34%
3.6.3243.66%
3.9.1213.21%
3.6.2203.05%
3.1.2J182.75%
3.1.2172.60%
3.9.2.3172.60%
3.9.2162.44%
3.8.7.4142.14%
3.9.0121.83%
4.0.0.2111.68%
3.5.2111.68%
4.1.0.3111.68%
3.8.4101.53%
4.1101.53%
3.9.1.391.37%
4.0.0.181.22%
3.6.071.07%
3.9.1.271.07%
3.9.2.171.07%
Other558.40%

Mirapoint (489 servers)

Version Number of Servers Percent
3.8.4-GA8818.00%
3.8.3-GA6312.88%
3.10.4-GA377.57%
3.8.7a377.57%
3.10.3-GA285.73%
3.8.6-GA265.32%
4.1.3-GA244.91%
3.8.2-GA224.50%
3.10.5-GA204.09%
3.8.5-GA183.68%
3.7.5a-GA183.68%
4.1.4-GA153.07%
4.0.5a142.86%
3.7.3a-GA132.66%
3.10.2-GA132.66%
3.7.4b-GA112.25%
4.1.5-GA102.04%
Other326.54%

InterScan VirusWall (420 servers)

Version Number of Servers Percent
Other420100.00%

VisNetic (417 servers)

Version Number of Servers Percent
9.3.2.013031.18%
9.1.4.16014.39%
5.8.6.6204.80%
8.5.0.8184.32%
5.0.2.3153.60%
8.0.3.1143.36%
6.2.2.0143.36%
5.5.8.3143.36%
7.2.4.1122.88%
8.0.3.0112.64%
9.1.4.0112.64%
8.0.3102.40%
8.3.692.16%
8.3.5.092.16%
7.6.1.081.92%
5.3.5.081.92%
5.4.5.471.68%
5.8.6.451.20%
Other4210.07%

MagicMail (357 servers)

Version Number of Servers Percent
Other357100.00%

NetIQ MailMarshal (293 servers)

Version Number of Servers Percent
6.0.3.823078.50%
5.5.6.7175.80%
6.1.3.15175.80%
5.5.4.1662.05%
5.5.6.651.71%
5.5.6.541.37%
5.5.5.931.02%
5.5.5.631.02%
5.5.4.1731.02%
Other51.71%

Interscan (247 servers)

Version Number of Servers Percent
3.55 (build 1016)4919.84%
3.8-Build_30134518.22%
3.81-Build_10222911.74%
3.55 (build 1029)228.91%
3.53 (build 2017)197.69%
3.53 (build 2011)124.86%
3.81-Build_1084124.86%
3.53 (build 1493)93.64%
3.55 (build 1020)83.24%
3.53 (build 2013)83.24%
3.52 (build 1375)72.83%
3.51 (build 1337)31.21%
3.8-Build_304531.21%
Other218.50%

Neon Mail Server (153 servers)

Version Number of Servers Percent
3.1.33925.49%
3.1.42415.69%
3.0.92415.69%
3.0.72113.73%
3.1.5149.15%
3.1.2138.50%
3.1.0127.84%
3.0.821.31%
3.0.621.31%
Other21.31%

WebSTAR V (128 servers)

Version Number of Servers Percent
5.4.14031.25%
5.4.03325.78%
5.3.43124.22%
5.3.2107.81%
5.3.3107.81%
5.3.121.56%
Other21.56%

Mercury (120 servers)

Version Number of Servers Percent
1.486050.00%
3.323327.50%
3.21c97.50%
1.4754.17%
3.3143.33%
3.2121.67%
3.01a21.67%
1.4921.67%
Other32.50%

ModusMail (66 servers)

Version Number of Servers Percent
3.2.315.01624.24%
4.35.480.01015.15%
4.35.477.01015.15%
3.1.302.057.58%
4.2.420.057.58%
4.35.480.1146.06%
4.3.459.046.06%
4.1.361.2134.55%
4.2.425.423.03%
3.1.293.123.03%
4.2.425.2211.52%
4.1.361.011.52%
4.0.340.311.52%
1.4.232.011.52%
4.35.477.811.52%
Other00.00%

MessageWall (57 servers)

Version Number of Servers Percent
1.0.84171.93%
1.0.111322.81%
1.1.023.51%
1.0.611.75%
Other00.00%

WebSTAR (46 servers)

Version Number of Servers Percent
Other46100.00%

MAILsweeper (46 servers)

Version Number of Servers Percent
4.3.20.01430.43%
4.3.14.0715.22%
4.3.17.0715.22%
4.2.10.048.70%
4.3.1.048.70%
4.3.6.036.52%
4.3.19.024.35%
4.3.10.024.35%
4.2.1.012.17%
4.3.12.012.17%
4.2.5.012.17%
Other00.00%

OpenVMS (23 servers)

Version Number of Servers Percent
8.31356.52%
7.3521.74%
8.228.70%
7.228.70%
6.114.35%
Other00.00%




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