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Mail (MX) Server Survey
January 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 Queried1,739,422   100.0%
Number of Servers that didn't respond276,59415.90%
    Server didn't open socket265,95615.29%
    Server didn't provide banner10,6380.61%
Server provided banner1,462,82884.10%
Server banner identifies software in use839,60148.27%

As indicated by the above table, of the 1,739,422 servers queried, only 839,601 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
Exim219,95926.20%
Sendmail190,81322.73%
Microsoft174,91620.83%
Postfix150,03717.87%
MailEnable24,6252.93%
MDaemon20,9202.49%
IMail17,5512.09%
Kerio5,6410.67%
Lotus Domino5,4870.65%
WinWebMail4,8260.57%
Merak4,4080.53%
CommuniGate Pro4,1970.50%
XMail2,4950.30%
GroupWise2,0890.25%
ArGoSoft2,0480.24%
Trend Micro1,9290.23%
Qmail Toaster1,6460.20%
SurgeSMTP1,4760.18%
Gordano Messaging Suite (GMS)7210.09%
Post.Office7090.08%
Mirapoint5070.06%
InterScan VirusWall4560.05%
VisNetic4250.05%
MagicMail3800.05%
NetIQ MailMarshal3490.04%
Interscan3030.04%
Neon Mail Server1530.02%
WebSTAR V1320.02%
Mercury1280.02%
ModusMail820.01%
MessageWall640.01%
WebSTAR600.01%
MAILsweeper490.01%
OpenVMS200.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (219,959 servers)

Version Number of Servers Percent
4.69154,38170.19%
4.6321,1469.61%
4.6814,1066.41%
4.679,1904.18%
4.664,3051.96%
4.604,2081.91%
4.503,6101.64%
4.622,9681.35%
Other6,0452.75%

Sendmail (190,813 servers)

Version Number of Servers Percent
8.13.132,05816.80%
8.12.11.2006061419,83410.39%
8.13.818,4269.66%
8.13.618,2259.55%
8.12.11.2006030816,7728.79%
8.11.611,8856.23%
8.13.6.2006061410,4375.47%
8.12.109,5234.99%
8.12.118,7194.57%
8.14.17,8594.12%
8.14.26,0363.16%
8.14.35,5152.89%
8.13.45,0382.64%
8.13.74,2662.24%
8.12.84,0772.14%
8.9.32,3651.24%
Other9,7785.12%

Microsoft (174,916 servers)

Version Number of Servers Percent
6.0.3790.3959133,25676.18%
6.0.3790.183024,67114.10%
5.0.2195.671311,1446.37%
6.0.3790.2113,0151.72%
Other2,8301.62%

Postfix (150,037 servers)

Version Number of Servers Percent
Other150,037100.00%

MailEnable (24,625 servers)

Version Number of Servers Percent
1.981--5,02120.39%
1.986--3,61514.68%
1.983--3,13612.74%
1.96--1,1814.80%
1.95--1,0954.45%
1.9--8743.55%
1.8--6622.69%
0-3.14-5932.41%
0-2.37-5882.39%
0-3.53-5222.12%
0-3.6-4671.90%
0-1.85-4601.87%
--3.63561.45%
0--3.533401.38%
0-2.52-3271.33%
0-1.87-2911.18%
0-2.38-2891.17%
0-2.36-2481.01%
Other4,56018.52%

MDaemon (20,920 servers)

Version Number of Servers Percent
10.0.22,64412.64%
9.6.61,7248.24%
10.0.11,5997.64%
9.6.51,3726.56%
9.6.11,3256.33%
10.0.01,1905.69%
9.6.48694.15%
9.6.27513.59%
9.5.27513.59%
8.1.37343.51%
9.5.66863.28%
9.0.46473.09%
9.5.15692.72%
9.6.34532.17%
7.2.34071.95%
6.8.54031.93%
9.0.13421.63%
7.2.03201.53%
9.0.02731.30%
9.5.52651.27%
8.1.42401.15%
8.0.22311.10%
8.1.12191.05%
Other2,90613.89%

IMail (17,551 servers)

Version Number of Servers Percent
8.223,75321.38%
8.152,09511.94%
9.231,4888.48%
10.011,2026.85%
8.051,0395.92%
9.109505.41%
10.026783.86%
7.076733.83%
9.215873.34%
7.155082.89%
10.04712.68%
6.064602.62%
8.003802.17%
8.213612.06%
8.043411.94%
9.223181.81%
9.203161.80%
8.012361.34%
8.102211.26%
8.201831.04%
Other1,2917.36%

Kerio (5,641 servers)

Version Number of Servers Percent
6.5.21,00817.87%
6.6.085415.14%
6.6.163311.22%
6.5.060110.65%
6.5.14548.05%
6.4.14117.29%
6.3.13676.51%
6.4.22444.33%
6.4.02324.11%
6.3.01492.64%
6.1.3621.10%
6.1.0591.05%
Other56710.05%

Lotus Domino (5,487 servers)

Version Number of Servers Percent
7.0.256510.30%
8.0.15099.28%
8.0.24478.15%
7.0.33596.54%
6.5.43035.52%
7.0.12955.38%
6.5.12504.56%
7.0.2FP22444.45%
6.5.32183.97%
7.01963.57%
6.5.51913.48%
7.0.3FP11863.39%
8.01823.32%
6.51512.75%
7.0.2FP11021.86%
5.0.11941.71%
6.5.2871.59%
5.0.12681.24%
7.0.2FP3681.24%
6.5.6641.17%
5.0.13a581.06%
Other85015.49%

WinWebMail (4,826 servers)

Version Number of Servers Percent
3.7.6.11,21225.11%
3.7.3.11,07122.19%
3.7.1.159512.33%
3.7.7.34439.18%
3.6.3.13266.76%
3.7.5.13216.65%
3.7.0.52685.55%
3.7.7.12204.56%
3.7.0.71653.42%
3.7.0.31633.38%
Other420.87%

Merak (4,408 servers)

Version Number of Servers Percent
8.0.31,78040.38%
8.9.14269.66%
8.5.02766.26%
7.4.52154.88%
7.6.42054.65%
7.5.21984.49%
8.3.81894.29%
7.4.2932.11%
9.0.0851.93%
7.6.1681.54%
7.2.0641.45%
6.2.1561.27%
8.2.4561.27%
8.2.13501.13%
8.9.0471.07%
Other60013.61%

CommuniGate Pro (4,197 servers)

Version Number of Servers Percent
4.1.83578.51%
5.2.102626.24%
5.1.132245.34%
4.2.102105.00%
5.2.81984.72%
5.1.121583.76%
5.1.161573.74%
5.2.91393.31%
5.2.61263.00%
5.2.31212.88%
5.1.141192.84%
5.2.51042.48%
5.2.01002.38%
5.0.13942.24%
5.0.9932.22%
5.0.14801.91%
5.1.7731.74%
5.1.9711.69%
5.1.10641.52%
5.2.7591.41%
5.1.8571.36%
4.2.8551.31%
5.1.11521.24%
4.2511.22%
4.2.7461.10%
4.2.9461.10%
5.2.1461.10%
5.0.8461.10%
4.3.12431.02%
Other94622.54%

XMail (2,495 servers)

Version Number of Servers Percent
1.2271728.74%
1.2559023.65%
1.2446518.64%
1.212118.46%
1.171154.61%
1.231004.01%
1.20993.97%
1.12642.57%
1.16321.28%
Other1024.09%

GroupWise (2,089 servers)

Version Number of Servers Percent
7.0.365631.40%
7.0.238118.24%
6.5.723711.35%
7.0.11778.47%
6.5.41386.61%
6.5.6984.69%
6.0.4854.07%
6.5.1582.78%
6.5.5562.68%
7.0502.39%
8.0.0251.20%
6.5.2221.05%
Other1065.07%

ArGoSoft (2,048 servers)

Version Number of Servers Percent
1.8 (1.8.9.5)49224.02%
1.8 (1.8.9.3)32115.67%
1.8 (1.8.9.1)23911.67%
1.8 (1.8.8.7)1637.96%
1.8 (1.8.8.8)1597.76%
1.8 (1.8.9.2)994.83%
1.8 (1.8.8.9)552.69%
1.8 (1.8.9.4)532.59%
1.8 (1.8.8.1)412.00%
1.8 (1.8.9.0)371.81%
1.8 (1.8.6.0)281.37%
1.8 (1.8.8.2)281.37%
1.8 (1.8.5.9)221.07%
Other31115.19%

Trend Micro (1,929 servers)

Version Number of Servers Percent
5.789246.24%
5.562832.56%
5.1828114.57%
7.0924.77%
Other361.87%

Qmail Toaster (1,646 servers)

Version Number of Servers Percent
1.31,35182.08%
1.222913.91%
1.0452.73%
1.5181.09%
Other30.18%

SurgeSMTP (1,476 servers)

Version Number of Servers Percent
3.9e-146731.64%
3.8k4-415410.43%
3.9c-115010.16%
3.9g2-21349.08%
3.8f3-3745.01%
3.7b8-8644.34%
3.8i3-3563.79%
3.6f5-5493.32%
3.5b3-3422.85%
3.8f2-2362.44%
3.0c2-2261.76%
3.8k2-2151.02%
Other20914.16%

Gordano Messaging Suite (GMS) (721 servers)

Version Number of Servers Percent
Other721100.00%

Post.Office (709 servers)

Version Number of Servers Percent
3.5.316022.57%
4.0.1659.17%
4.1.0.2537.48%
3.5.3J527.33%
3.8.3385.36%
3.6.3273.81%
3.9.2.3253.53%
3.9.1253.53%
3.6.2223.10%
3.1.2J212.96%
3.8.7.4202.82%
3.1.2192.68%
3.9.2182.54%
3.9.0152.12%
4.1131.83%
3.8.4121.69%
3.5.2111.55%
4.0.0.2101.41%
3.9.2.1101.41%
4.0.0.191.27%
3.6.081.13%
3.9.1.381.13%
Other689.59%

Mirapoint (507 servers)

Version Number of Servers Percent
3.8.4-GA8917.55%
3.8.3-GA7314.40%
3.8.6-GA499.66%
3.8.7a458.88%
3.10.3-GA377.30%
3.7.5a-GA336.51%
3.8.5-GA326.31%
3.8.2-GA234.54%
3.7.3a-GA224.34%
3.10.2-GA193.75%
3.7.4b-GA163.16%
4.0.5a142.76%
4.1.3-GA101.97%
Other458.88%

InterScan VirusWall (456 servers)

Version Number of Servers Percent
Other456100.00%

VisNetic (425 servers)

Version Number of Servers Percent
9.1.4.19121.41%
9.3.2.05312.47%
5.8.6.6245.65%
7.2.4.1235.41%
9.1.4.0214.94%
8.5.0.8204.71%
8.3.5.0184.24%
6.2.2.0174.00%
5.0.2.3153.53%
8.0.3.0153.53%
8.0.3.1143.29%
8.0.3133.06%
5.5.8.3133.06%
7.6.1.0102.35%
8.3.692.12%
5.3.5.092.12%
5.8.6.471.65%
5.4.5.471.65%
6.0.9.051.18%
Other419.65%

MagicMail (380 servers)

Version Number of Servers Percent
Other380100.00%

NetIQ MailMarshal (349 servers)

Version Number of Servers Percent
6.0.3.826977.08%
5.5.6.7246.88%
6.1.3.15195.44%
5.5.6.692.58%
5.5.4.1661.72%
5.5.6.541.15%
5.5.5.941.15%
5.5.5.641.15%
Other102.87%

Interscan (303 servers)

Version Number of Servers Percent
3.8-Build_30135217.16%
3.55 (build 1016)4916.17%
3.81-Build_10224414.52%
3.55 (build 1029)309.90%
3.53 (build 2017)237.59%
3.53 (build 2011)175.61%
3.53 (build 1493)165.28%
3.55 (build 1020)134.29%
3.53 (build 2013)113.63%
3.81-Build_1084113.63%
3.52 (build 1375)82.64%
Other299.57%

Neon Mail Server (153 servers)

Version Number of Servers Percent
3.1.34630.07%
3.0.72918.95%
3.0.92616.99%
3.1.01811.76%
3.1.2159.80%
3.1.474.58%
3.0.842.61%
3.1.131.96%
3.0.631.96%
3.0.521.31%
Other00.00%

WebSTAR V (132 servers)

Version Number of Servers Percent
5.4.14030.30%
5.4.03224.24%
5.3.43123.48%
5.3.31410.61%
5.3.2129.09%
5.3.121.52%
Other10.76%

Mercury (128 servers)

Version Number of Servers Percent
1.485744.53%
3.324333.59%
3.21c118.59%
3.3153.91%
1.4743.12%
1.4421.56%
3.2121.56%
3.01a21.56%
Other21.56%

ModusMail (82 servers)

Version Number of Servers Percent
3.2.315.01720.73%
4.35.480.01518.29%
4.35.477.01012.20%
4.35.480.1189.76%
4.3.459.089.76%
3.1.302.078.54%
4.1.361.2133.66%
3.1.293.122.44%
4.2.420.022.44%
4.1.361.022.44%
4.2.425.411.22%
4.0.340.311.22%
3.0.273.011.22%
4.0.330.811.22%
1.4.232.011.22%
4.35.48011.22%
4.2.425.2211.22%
4.35.477.811.22%
Other00.00%

MessageWall (64 servers)

Version Number of Servers Percent
1.0.84773.44%
1.0.111421.88%
1.1.023.12%
1.0.611.56%
Other00.00%

WebSTAR (60 servers)

Version Number of Servers Percent
Other60100.00%

MAILsweeper (49 servers)

Version Number of Servers Percent
4.3.20.01632.65%
4.3.14.0816.33%
4.3.17.0714.29%
4.2.10.0510.20%
4.3.1.0510.20%
4.3.19.048.16%
4.3.6.012.04%
4.2.5.012.04%
4.1.5.012.04%
4.3.10.012.04%
Other00.00%

OpenVMS (20 servers)

Version Number of Servers Percent
8.31155.00%
7.3630.00%
8.2210.00%
6.115.00%
Other00.00%




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