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Mail (MX) Server Survey
February 1st, 2010

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 Queried2,009,674   100.0%
Number of Servers that didn't respond325,26916.19%
    Server didn't open socket312,80015.56%
    Server didn't provide banner12,4690.62%
Server provided banner1,684,40583.81%
Server banner identifies software in use936,44146.60%

As indicated by the above table, of the 2,009,674 servers queried, only 936,441 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
Exim296,12931.62%
Postfix186,16819.88%
Microsoft178,58919.07%
Sendmail171,06618.27%
MailEnable29,1703.11%
MDaemon22,4092.39%
IMail14,4461.54%
Kerio7,2910.78%
Lotus Domino5,4350.58%
WinWebMail4,9360.53%
CommuniGate Pro3,9140.42%
Merak3,0970.33%
XMail2,6050.28%
Qmail Toaster1,7780.19%
ArGoSoft1,5810.17%
GroupWise1,5150.16%
SurgeSMTP1,4510.15%
Trend Micro1,2100.13%
Gordano Messaging Suite (GMS)6600.07%
Post.Office5580.06%
MagicMail4800.05%
Mirapoint4120.04%
VisNetic3680.04%
InterScan VirusWall3430.04%
NetIQ MailMarshal1990.02%
Interscan1530.02%
Mercury990.01%
WebSTAR V970.01%
Neon Mail Server910.01%
ModusMail510.01%
MessageWall500.01%
WebSTAR330.00%
MAILsweeper280.00%
OpenVMS260.00%
OpenSMTPD30.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (296,129 servers)

Version Number of Servers Percent
4.69247,81883.69%
4.6313,8094.66%
4.6713,4924.56%
4.664,1581.40%
4.682,9851.01%
Other13,8674.68%

Postfix (186,168 servers)

Version Number of Servers Percent
Other186,168100.00%

Microsoft (178,589 servers)

Version Number of Servers Percent
6.0.3790.3959153,50885.96%
6.0.3790.183014,2747.99%
5.0.2195.67137,0243.93%
Other3,7832.12%

Sendmail (171,066 servers)

Version Number of Servers Percent
8.13.133,85019.79%
8.13.823,99114.02%
8.14.317,59910.29%
8.12.11.2006061414,8678.69%
8.12.11.2006030814,2988.36%
8.13.611,3116.61%
8.13.6.2006061410,3686.06%
8.12.106,4773.79%
8.11.65,9673.49%
8.14.25,2883.09%
8.12.114,4192.58%
8.14.14,3052.52%
8.13.43,3641.97%
8.13.73,1521.84%
8.12.82,7531.61%
8.9.31,7581.03%
Other7,2994.27%

MailEnable (29,170 servers)

Version Number of Servers Percent
1.986--8,21428.16%
1.981--3,83013.13%
1.983--2,4788.50%
3.62--1,5915.45%
1.96--7312.51%
1.95--7152.45%
0-3.63-6862.35%
1.9--5791.98%
0-3.61-4961.70%
0-3.6-4831.66%
0-1.87-4561.56%
4.0--4241.45%
0-2.53-4211.44%
1.8--4071.40%
0-3.62-3871.33%
0-3.14-3721.28%
--3.633621.24%
0-2.37-3281.12%
Other6,21021.29%

MDaemon (22,409 servers)

Version Number of Servers Percent
10.1.24,49520.06%
10.1.12,27410.15%
10.0.01,4286.37%
9.6.11,0414.65%
10.0.59594.28%
9.6.69234.12%
10.1.08263.69%
9.6.57283.25%
10.0.47203.21%
9.5.26442.87%
10.0.25682.53%
9.6.45422.42%
9.5.15192.32%
8.1.35112.28%
9.5.64932.20%
9.6.24842.16%
9.0.44592.05%
9.6.33121.39%
6.8.52921.30%
7.2.32881.29%
9.5.52651.18%
9.0.12581.15%
10.0.12481.11%
7.2.02431.08%
Other2,88912.89%

IMail (14,446 servers)

Version Number of Servers Percent
8.222,68118.56%
8.151,4249.86%
11.01,3219.14%
9.231,1547.99%
10.029276.42%
8.057845.43%
11.016494.49%
9.105743.97%
9.205583.86%
7.075133.55%
10.014983.45%
9.214162.88%
7.153652.53%
6.062992.07%
8.002751.90%
8.041981.37%
8.211931.34%
8.101721.19%
10.01721.19%
9.221521.05%
8.011491.03%
Other9726.73%

Kerio (7,291 servers)

Version Number of Servers Percent
6.7.21,42819.59%
6.7.31,13815.61%
6.7.084611.60%
6.6.278710.79%
6.7.15567.63%
6.5.23564.88%
6.5.03224.42%
6.4.12453.36%
6.3.12303.15%
6.6.01862.55%
6.5.11722.36%
6.4.01502.06%
6.6.11401.92%
6.4.21221.67%
6.3.01011.39%
Other5127.02%

Lotus Domino (5,435 servers)

Version Number of Servers Percent
8.5.159610.97%
8.555610.23%
7.0.24147.62%
8.0.22995.50%
8.0.12725.00%
7.0.32694.95%
7.0.12284.20%
6.5.42033.74%
6.5.11883.46%
8.5FP11703.13%
6.5.31643.02%
7.0.2FP21592.93%
7.0.3FP11542.83%
7.01352.48%
6.5.51342.47%
8.01302.39%
6.51242.28%
5.0.11761.40%
7.0.2FP1631.16%
6.5.2611.12%
7.0.2FP3591.09%
6.5.6571.05%
Other92417.00%

WinWebMail (4,936 servers)

Version Number of Servers Percent
3.8.0.11,19724.25%
3.7.6.191318.50%
3.7.3.171214.42%
3.7.7.369013.98%
3.7.1.13857.80%
3.7.5.12374.80%
3.6.3.11913.87%
3.7.0.51683.40%
3.7.7.11673.38%
3.7.0.31202.43%
3.7.0.71192.41%
Other370.75%

CommuniGate Pro (3,914 servers)

Version Number of Servers Percent
5.2.162947.51%
4.1.82496.36%
5.2.141624.14%
5.1.131594.06%
4.2.101594.06%
5.2.181574.01%
5.1.161383.53%
5.2.121313.35%
5.2.131223.12%
5.2.171092.78%
5.2.31022.61%
5.2.8942.40%
5.1.12942.40%
5.2.10872.22%
5.0.14832.12%
5.3.0721.84%
5.2.11681.74%
5.0.13671.71%
5.2.15621.58%
5.1.14601.53%
5.2.6591.51%
5.0.9581.48%
5.2.9561.43%
5.1.9541.38%
4.2.9431.10%
5.2.0431.10%
4.2.8431.10%
Other1,08927.82%

Merak (3,097 servers)

Version Number of Servers Percent
8.0.31,28941.62%
8.9.12969.56%
8.5.01946.26%
7.4.51775.72%
7.5.21404.52%
7.6.41254.04%
8.3.81203.87%
7.4.2521.68%
8.2.13471.52%
9.0.0461.49%
7.6.1461.49%
7.2.0451.45%
8.2.4351.13%
8.3.15341.10%
7.0.1331.07%
6.2.1321.03%
Other38612.46%

XMail (2,605 servers)

Version Number of Servers Percent
1.2570727.14%
1.2264624.80%
1.2438214.66%
1.2629211.21%
1.211636.26%
1.23833.19%
1.20772.96%
1.17702.69%
1.12622.38%
Other1234.72%

Qmail Toaster (1,778 servers)

Version Number of Servers Percent
1.31,58188.92%
1.21508.44%
1.0301.69%
Other170.96%

ArGoSoft (1,581 servers)

Version Number of Servers Percent
1.8 (1.8.9.5)29818.85%
1.8 (1.8.9.6)23314.74%
1.8 (1.8.9.3)22013.92%
1.8 (1.8.9.1)1529.61%
1.8 (1.8.8.8)1217.65%
1.8 (1.8.8.7)1016.39%
1.8 (1.8.9.2)654.11%
1.8 (1.8.9.4)452.85%
1.8 (1.8.8.9)392.47%
1.8 (1.8.8.1)342.15%
1.8 (1.8.6.0)281.77%
1.8 (1.8.9.0)271.71%
1.8 (1.8.8.2)171.08%
Other20112.71%

GroupWise (1,515 servers)

Version Number of Servers Percent
7.0.348131.75%
7.0.219012.54%
6.5.717211.35%
8.0.11318.65%
7.0.11046.86%
6.5.4905.94%
8.0.0785.15%
6.5.6583.83%
6.0.4533.50%
6.5.1392.57%
6.5.5261.72%
7.0191.25%
Other744.88%

SurgeSMTP (1,451 servers)

Version Number of Servers Percent
3.9e-126518.26%
4.2a3-322715.64%
4.2d2-221815.02%
4.0u4-41208.27%
3.8k4-4906.20%
3.8f3-3412.83%
3.9c-1392.69%
3.8i3-3372.55%
3.7b8-8352.41%
3.6f5-5312.14%
3.9h-65271.86%
3.9g2-2271.86%
3.5b3-3201.38%
3.8f2-2191.31%
4.0u3-3151.03%
3.0c2-2151.03%
Other22515.51%

Trend Micro (1,210 servers)

Version Number of Servers Percent
5.757147.19%
5.534328.35%
5.1817714.63%
7.0927.60%
Other272.23%

Gordano Messaging Suite (GMS) (660 servers)

Version Number of Servers Percent
Other660100.00%

Post.Office (558 servers)

Version Number of Servers Percent
3.5.310518.82%
4.1.0.26010.75%
3.5.3J458.06%
4.0.1458.06%
3.8.3305.38%
3.9.2.3173.05%
4.1.0.4173.05%
3.1.2J162.87%
3.9.1152.69%
3.6.3152.69%
4.1.1152.69%
3.6.2152.69%
3.9.2142.51%
3.8.7.4122.15%
3.1.2111.97%
4.0.0.2101.79%
4.1101.79%
3.9.2.181.43%
3.9.1.381.43%
4.1.0.381.43%
3.8.481.43%
3.9.071.25%
4.0.0.171.25%
4.0.1.171.25%
3.9.1.261.08%
Other478.42%

MagicMail (480 servers)

Version Number of Servers Percent
Other480100.00%

Mirapoint (412 servers)

Version Number of Servers Percent
3.8.4-GA4811.65%
3.8.3-GA4410.68%
3.10.5-GA399.47%
3.10.7-GA358.50%
3.10.8-GA358.50%
3.10.4-GA276.55%
4.1.3-GA163.88%
4.1.8-GA163.88%
3.10.6-GA163.88%
3.8.7a133.16%
3.10.3-GA133.16%
3.8.6-GA133.16%
3.8.5-GA122.91%
4.1.4-GA112.67%
3.7.5a-GA102.43%
3.8.2-GA92.18%
4.1.5-GA81.94%
4.1.7a-GA71.70%
4.0.5a71.70%
4.1.6-GA61.46%
3.7.4b-GA51.21%
3.10.2-GA51.21%
Other174.13%

VisNetic (368 servers)

Version Number of Servers Percent
9.3.2.014038.04%
9.1.4.15013.59%
5.8.6.6184.89%
5.0.2.3133.53%
8.5.0.8133.53%
6.2.2.0123.26%
5.5.8.3123.26%
9.1.4.0112.99%
8.0.3.1102.72%
8.3.5.092.45%
7.6.1.082.17%
8.3.671.90%
8.0.3.071.90%
7.2.4.171.90%
5.4.5.461.63%
8.0.361.63%
5.3.5.051.36%
5.0.2.141.09%
Other308.15%

InterScan VirusWall (343 servers)

Version Number of Servers Percent
Other343100.00%

NetIQ MailMarshal (199 servers)

Version Number of Servers Percent
6.0.3.815175.88%
6.1.3.15147.04%
5.5.6.7126.03%
5.5.6.642.01%
5.5.6.542.01%
5.5.4.1642.01%
5.5.4.1721.01%
5.5.5.621.01%
Other63.02%

Interscan (153 servers)

Version Number of Servers Percent
3.55 (build 1016)2717.65%
3.81-Build_10222013.07%
3.55 (build 1029)1711.11%
3.53 (build 2017)1610.46%
3.81-Build_1084127.84%
3.8-Build_3013117.19%
3.53 (build 1493)95.88%
3.53 (build 2011)85.23%
3.53 (build 2013)63.92%
3.55 (build 1020)53.27%
3.52 (build 1375)31.96%
3.8-Build_108021.31%
3.53 (build 1494)21.31%
3.51 (build 1337)21.31%
3.81-Build_105521.31%
Other117.19%

Mercury (99 servers)

Version Number of Servers Percent
1.484949.49%
3.322828.28%
3.21c99.09%
1.4733.03%
3.2122.02%
3.01a22.02%
1.4922.02%
1.4411.01%
4.5211.01%
3.3111.01%
3.3011.01%
Other00.00%

WebSTAR V (97 servers)

Version Number of Servers Percent
5.4.13232.99%
5.4.02525.77%
5.3.42424.74%
5.3.288.25%
5.3.366.19%
5.3.011.03%
5.3.111.03%
Other00.00%

Neon Mail Server (91 servers)

Version Number of Servers Percent
3.1.32325.27%
3.0.71617.58%
3.0.91213.19%
3.1.41112.09%
3.1.21010.99%
3.1.099.89%
3.1.555.49%
3.1.122.20%
3.0.811.10%
3.0.611.10%
3.0.511.10%
Other00.00%

ModusMail (51 servers)

Version Number of Servers Percent
3.2.315.01427.45%
4.35.477.0917.65%
4.35.480.0713.73%
3.1.302.0611.76%
4.2.420.059.80%
4.1.361.2123.92%
3.1.293.123.92%
4.35.480.1123.92%
4.2.425.2211.96%
4.0.340.311.96%
4.3.459.011.96%
4.35.477.811.96%
Other00.00%

MessageWall (50 servers)

Version Number of Servers Percent
1.0.83264.00%
1.0.111530.00%
1.1.024.00%
1.0.612.00%
Other00.00%

WebSTAR (33 servers)

Version Number of Servers Percent
Other33100.00%

MAILsweeper (28 servers)

Version Number of Servers Percent
4.3.20.0725.00%
4.3.17.0517.86%
4.3.14.0517.86%
4.3.1.0310.71%
4.2.10.027.14%
4.3.6.027.14%
4.3.19.013.57%
4.3.10.013.57%
4.3.12.013.57%
4.2.5.013.57%
Other00.00%

OpenVMS (26 servers)

Version Number of Servers Percent
8.31765.38%
7.3519.23%
8.227.69%
6.113.85%
7.213.85%
Other00.00%

OpenSMTPD (3 servers)

Version Number of Servers Percent
Other3100.00%




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