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Mail (MX) Server Survey
November 1st, 2008

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 Queried1,934,409   100.0%
Number of Servers that didn't respond325,77316.84%
    Server didn't open socket313,31316.20%
    Server didn't provide banner12,4600.64%
Server provided banner1,608,63683.16%
Server banner identifies software in use927,87847.97%

As indicated by the above table, of the 1,934,409 servers queried, only 927,878 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
Exim231,00524.90%
Sendmail217,62623.45%
Microsoft202,36621.81%
Postfix161,24917.38%
MailEnable25,9492.80%
MDaemon23,1832.50%
IMail20,7892.24%
Lotus Domino6,3200.68%
Kerio6,2140.67%
WinWebMail5,1120.55%
Merak4,8570.52%
CommuniGate Pro4,6290.50%
XMail2,6730.29%
GroupWise2,5210.27%
Trend Micro2,3740.26%
ArGoSoft2,2520.24%
Qmail Toaster1,7730.19%
SurgeSMTP1,6490.18%
Gordano Messaging Suite (GMS)9010.10%
Post.Office7950.09%
Mirapoint5660.06%
InterScan VirusWall5460.06%
VisNetic4830.05%
NetIQ MailMarshal4660.05%
MagicMail4200.05%
Interscan3610.04%
WebSTAR V1720.02%
Neon Mail Server1670.02%
Mercury1530.02%
ModusMail930.01%
MessageWall690.01%
WebSTAR650.01%
MAILsweeper530.01%
OpenVMS270.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (231,005 servers)

Version Number of Servers Percent
4.69156,15167.60%
4.6323,92710.36%
4.6816,9087.32%
4.678,7643.79%
4.664,8452.10%
4.604,7992.08%
4.504,2331.83%
4.624,2321.83%
Other7,1463.09%

Sendmail (217,626 servers)

Version Number of Servers Percent
8.13.136,09416.59%
8.12.11.2006061424,46111.24%
8.13.621,0559.67%
8.12.11.2006030819,5018.96%
8.13.819,1908.82%
8.11.614,5786.70%
8.12.1011,1645.13%
8.13.6.2006061411,1645.13%
8.12.1110,4444.80%
8.14.18,9324.10%
8.14.26,3522.92%
8.13.45,8412.68%
8.13.74,9312.27%
8.14.34,8752.24%
8.12.84,7102.16%
8.9.32,7781.28%
8.10.22,3871.10%
Other9,1694.21%

Microsoft (202,366 servers)

Version Number of Servers Percent
6.0.3790.3959149,70373.98%
6.0.3790.183031,24515.44%
5.0.2195.671313,8936.87%
6.0.3790.2114,0912.02%
Other3,4341.70%

Postfix (161,249 servers)

Version Number of Servers Percent
Other161,249100.00%

MailEnable (25,949 servers)

Version Number of Servers Percent
1.981--5,61321.63%
1.983--3,33312.84%
1.986--2,96411.42%
1.96--1,3435.18%
1.95--1,2414.78%
1.9--1,0093.89%
1.8--7823.01%
0-3.14-7532.90%
0-2.37-6712.59%
0-1.85-5602.16%
0-3.53-5522.13%
0--3.534581.77%
0-2.52-4481.73%
0--3.143401.31%
0-2.38-3271.26%
0-1.87-3011.16%
0-2.36-2921.13%
0-3.52-2921.13%
0-3.04-2881.11%
Other4,38216.89%

MDaemon (23,183 servers)

Version Number of Servers Percent
10.0.03,80416.41%
9.6.62,46110.62%
9.6.51,6997.33%
9.6.11,4616.30%
9.6.41,0954.72%
9.6.29113.93%
8.1.38453.64%
9.5.68123.50%
9.5.28073.48%
9.0.47413.20%
10.0.16963.00%
9.5.16592.84%
9.6.35912.55%
7.2.34792.07%
6.8.54541.96%
7.2.03971.71%
9.0.13701.60%
9.5.53271.41%
9.0.03151.36%
8.0.22891.25%
8.1.42821.22%
8.1.12441.05%
9.5.42421.04%
9.6.02351.01%
Other2,96712.80%

IMail (20,789 servers)

Version Number of Servers Percent
8.224,40521.19%
8.152,89213.91%
9.231,8008.66%
10.011,7378.36%
8.051,2455.99%
9.101,1795.67%
7.078023.86%
9.217163.44%
7.157093.41%
10.06943.34%
6.065182.49%
9.224252.04%
8.004162.00%
9.203631.75%
8.213501.68%
8.043291.58%
8.012521.21%
8.102461.18%
8.202121.02%
Other1,4997.21%

Lotus Domino (6,320 servers)

Version Number of Servers Percent
7.0.268810.89%
8.0.16259.89%
7.0.33916.19%
6.5.43525.57%
7.0.13415.40%
7.0.2FP23034.79%
6.5.13024.78%
8.0.22964.68%
6.5.32744.34%
7.02353.72%
8.02243.54%
6.5.52233.53%
6.51933.05%
7.0.3FP11792.83%
7.0.2FP11392.20%
5.0.111151.82%
6.5.21111.76%
5.0.12761.20%
7.0.2FP3751.19%
6.5.6751.19%
5.0.13a651.03%
Other1,03816.42%

Kerio (6,214 servers)

Version Number of Servers Percent
6.5.22,02132.52%
6.5.074912.05%
6.5.169511.18%
6.4.15238.42%
6.3.14567.34%
6.4.23235.20%
6.4.03215.17%
6.3.01832.94%
6.6.0961.54%
6.1.0721.16%
6.1.3711.14%
6.2.2691.11%
6.2.0661.06%
Other5699.16%

WinWebMail (5,112 servers)

Version Number of Servers Percent
3.7.6.11,34926.39%
3.7.3.11,23124.08%
3.7.1.170713.83%
3.7.5.14047.90%
3.6.3.13717.26%
3.7.0.53015.89%
3.7.7.12304.50%
3.7.0.72013.93%
3.7.0.31793.50%
3.7.7.3871.70%
Other521.02%

Merak (4,857 servers)

Version Number of Servers Percent
8.0.31,87438.58%
8.9.149510.19%
8.5.03066.30%
7.4.52495.13%
7.6.42304.74%
7.5.22174.47%
8.3.82094.30%
7.4.21102.26%
9.0.0982.02%
7.2.0761.56%
7.6.1731.50%
6.2.1711.46%
8.2.4681.40%
8.2.13531.09%
8.9.0491.01%
Other67913.98%

CommuniGate Pro (4,629 servers)

Version Number of Servers Percent
4.1.83808.21%
5.2.83086.65%
5.1.132535.47%
4.2.102525.44%
5.1.121924.15%
5.1.161743.76%
5.2.61563.37%
5.2.31533.31%
5.1.141463.15%
5.2.51282.77%
5.0.131262.72%
5.2.01232.66%
5.0.91132.44%
5.1.10982.12%
5.0.14911.97%
5.1.8901.94%
5.1.9861.86%
5.1.7821.77%
5.2.7761.64%
5.1.11661.43%
5.2.1661.43%
4.2.8621.34%
4.2601.30%
4.3.12571.23%
4.2.9571.23%
4.2.7561.21%
5.0.8551.19%
5.0.11521.12%
5.1.5481.04%
Other1,02322.10%

XMail (2,673 servers)

Version Number of Servers Percent
1.2279929.89%
1.2558121.74%
1.2451519.27%
1.212469.20%
1.171214.53%
1.201164.34%
1.231074.00%
1.12622.32%
1.16351.31%
Other913.40%

GroupWise (2,521 servers)

Version Number of Servers Percent
7.0.371328.28%
7.0.252420.79%
6.5.728911.46%
7.0.12319.16%
6.5.41646.51%
6.5.61174.64%
6.0.4993.93%
7.0702.78%
6.5.1672.66%
6.5.5672.66%
6.5.2291.15%
6.5.3261.03%
Other1254.96%

Trend Micro (2,374 servers)

Version Number of Servers Percent
5.71,12547.39%
5.576932.39%
5.1834214.41%
7.0954.00%
Other431.81%

ArGoSoft (2,252 servers)

Version Number of Servers Percent
1.8 (1.8.9.5)48721.63%
1.8 (1.8.9.3)36516.21%
1.8 (1.8.9.1)27812.34%
1.8 (1.8.8.7)1818.04%
1.8 (1.8.8.8)1757.77%
1.8 (1.8.9.2)1245.51%
1.8 (1.8.8.9)612.71%
1.8 (1.8.9.4)612.71%
1.8 (1.8.8.1)462.04%
1.8 (1.8.9.0)381.69%
1.8 (1.8.6.0)371.64%
1.8 (1.8.8.2)321.42%
1.8 (1.8.5.9)281.24%
Other33915.05%

Qmail Toaster (1,773 servers)

Version Number of Servers Percent
1.31,43480.88%
1.226414.89%
1.0553.10%
1.5181.02%
Other20.11%

SurgeSMTP (1,649 servers)

Version Number of Servers Percent
3.9e-149930.26%
3.8k4-418211.04%
3.9c-117710.73%
3.9g2-216510.01%
3.8f3-3804.85%
3.7b8-8674.06%
3.8i3-3583.52%
3.6f5-5503.03%
3.5b3-3492.97%
3.8f2-2352.12%
3.0c2-2291.76%
3.8k2-2191.15%
Other23914.49%

Gordano Messaging Suite (GMS) (901 servers)

Version Number of Servers Percent
Other901100.00%

Post.Office (795 servers)

Version Number of Servers Percent
3.5.319324.28%
4.0.1739.18%
3.5.3J546.79%
4.1.0.2486.04%
3.8.3425.28%
3.6.3313.90%
3.1.2J273.40%
3.9.2.3273.40%
3.6.2263.27%
3.9.1263.27%
3.9.0222.77%
3.9.2222.77%
3.8.7.4212.64%
3.1.2192.39%
3.8.4172.14%
4.1141.76%
3.5.2131.64%
3.9.1.3131.64%
3.9.2.1111.38%
4.0.0.1101.26%
3.8.291.13%
4.0.0.291.13%
Other688.55%

Mirapoint (566 servers)

Version Number of Servers Percent
3.8.4-GA10518.55%
3.8.3-GA8515.02%
3.8.6-GA6912.19%
3.8.7a508.83%
3.8.5-GA427.42%
3.7.5a-GA427.42%
3.10.2-GA325.65%
3.8.2-GA254.42%
3.7.3a-GA244.24%
3.7.4b-GA203.53%
4.0.5a152.65%
3.7.5-GA91.59%
Other488.48%

InterScan VirusWall (546 servers)

Version Number of Servers Percent
Other546100.00%

VisNetic (483 servers)

Version Number of Servers Percent
9.1.4.115331.68%
8.5.0.8285.80%
5.8.6.6275.59%
9.1.4.0275.59%
7.2.4.1255.18%
8.3.5.0234.76%
5.0.2.3234.76%
6.2.2.0183.73%
8.0.3.0153.11%
5.5.8.3153.11%
8.0.3.1153.11%
7.6.1.0132.69%
8.0.3122.48%
8.3.6112.28%
5.3.5.0112.28%
5.4.5.491.86%
7.5.3.081.66%
5.8.6.471.45%
8.5.0.551.04%
6.0.9.051.04%
7.2.4.051.04%
Other285.80%

NetIQ MailMarshal (466 servers)

Version Number of Servers Percent
6.0.3.836778.76%
5.5.6.7255.36%
6.1.3.15234.94%
5.5.6.6122.58%
5.5.5.971.50%
5.5.6.571.50%
5.5.4.1671.50%
5.5.4.1751.07%
5.5.5.651.07%
Other81.72%

MagicMail (420 servers)

Version Number of Servers Percent
Other420100.00%

Interscan (361 servers)

Version Number of Servers Percent
3.55 (build 1016)6217.17%
3.8-Build_30135715.79%
3.81-Build_10224813.30%
3.55 (build 1029)369.97%
3.53 (build 2017)318.59%
3.53 (build 2011)195.26%
3.53 (build 1493)164.43%
3.53 (build 2013)133.60%
3.81-Build_1084133.60%
3.55 (build 1020)133.60%
3.52 (build 1375)92.49%
3.8-Build_108082.22%
3.8-Build_304541.11%
Other328.86%

WebSTAR V (172 servers)

Version Number of Servers Percent
5.4.15632.56%
5.3.44023.26%
5.4.04023.26%
5.3.3179.88%
5.3.2158.72%
5.3.121.16%
5.3.021.16%
Other00.00%

Neon Mail Server (167 servers)

Version Number of Servers Percent
3.1.35633.53%
3.0.73118.56%
3.0.92816.77%
3.1.21810.78%
3.1.01710.18%
3.1.474.19%
3.0.831.80%
3.1.131.80%
3.0.521.20%
3.0.621.20%
Other00.00%

Mercury (153 servers)

Version Number of Servers Percent
1.487146.41%
3.324831.37%
3.21c117.19%
3.3174.58%
1.4753.27%
1.4431.96%
3.2131.96%
1.4921.31%
Other31.96%

ModusMail (93 servers)

Version Number of Servers Percent
4.35.480.02122.58%
3.2.315.01617.20%
4.35.477.01212.90%
4.3.459.099.68%
4.35.480.1188.60%
3.1.302.066.45%
4.2.420.044.30%
4.1.361.2133.23%
4.1.361.033.23%
4.2.425.422.15%
3.1.293.122.15%
1.4.232.011.08%
4.2.420.111.08%
4.0.330.811.08%
4.0.340.311.08%
4.35.48011.08%
4.2.425.2211.08%
4.35.477.811.08%
Other00.00%

MessageWall (69 servers)

Version Number of Servers Percent
1.0.85173.91%
1.0.111521.74%
1.1.022.90%
1.0.611.45%
Other00.00%

WebSTAR (65 servers)

Version Number of Servers Percent
Other65100.00%

MAILsweeper (53 servers)

Version Number of Servers Percent
4.3.20.01528.30%
4.3.14.0815.09%
4.3.17.0815.09%
4.3.1.059.43%
4.3.19.047.55%
4.2.10.047.55%
4.3.10.023.77%
4.3.12.023.77%
4.3.6.023.77%
4.2.1.011.89%
4.2.5.011.89%
4.1.5.011.89%
Other00.00%

OpenVMS (27 servers)

Version Number of Servers Percent
8.31659.26%
7.3622.22%
8.2311.11%
6.113.70%
7.213.70%
Other00.00%



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