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Mail (MX) Server Survey
December 1st, 2012

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 Queried2,339,420   100.0%
Number of Servers that didn't respond387,45316.56%
    Server didn't open socket377,19916.12%
    Server didn't provide banner10,2540.44%
Server provided banner1,951,96783.44%
Server banner identifies software in use1,072,48645.84%

As indicated by the above table, of the 2,339,420 servers queried, only 1,072,486 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
Exim517,11448.22%
Postfix262,93924.52%
Sendmail117,27010.93%
Microsoft93,5158.72%
MailEnable33,0123.08%
MDaemon20,0861.87%
IMail7,2720.68%
Lotus Domino4,3540.41%
WinWebMail3,1560.29%
CommuniGate Pro3,0680.29%
XMail2,0800.19%
Kerio1,5910.15%
Qmail Toaster1,5860.15%
Merak1,1990.11%
SurgeSMTP1,0250.10%
ArGoSoft7130.07%
GroupWise5170.05%
Gordano Messaging Suite (GMS)3360.03%
Post.Office3350.03%
Trend Micro3330.03%
MagicMail3070.03%
Mirapoint1630.02%
InterScan VirusWall1280.01%
VisNetic1230.01%
Mercury460.00%
Interscan430.00%
NetIQ MailMarshal340.00%
WebSTAR V310.00%
Neon Mail Server260.00%
OpenVMS200.00%
MessageWall170.00%
OpenSMTPD160.00%
ModusMail140.00%
WebSTAR140.00%
MAILsweeper30.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (517,114 servers)

Version Number of Servers Percent
4.80331,80664.16%
4.7650,0599.68%
4.7745,8878.87%
4.6932,8456.35%
4.7223,5334.55%
4.80.17,2261.40%
4.676,0741.17%
Other19,6843.81%

Postfix (262,939 servers)

Version Number of Servers Percent
Other262,939100.00%

Sendmail (117,270 servers)

Version Number of Servers Percent
8.13.831,28526.68%
8.13.118,39615.69%
8.14.315,63513.33%
8.14.513,04611.12%
8.14.411,1699.52%
8.12.11.200603084,5803.91%
8.13.6.200606143,6103.08%
8.14.23,2092.74%
8.11.62,2241.90%
8.12.102,0111.71%
8.14.11,7891.53%
8.13.61,6381.40%
8.13.71,3801.18%
8.12.11.200606141,3601.16%
8.12.111,1951.02%
Other4,7434.04%

Microsoft (93,515 servers)

Version Number of Servers Percent
6.0.3790.467575,50780.74%
6.0.3790.395910,20510.91%
6.0.3790.18302,7942.99%
7.5.7601.175141,5001.60%
5.0.2195.73819881.06%
Other2,5212.70%

MailEnable (33,012 servers)

Version Number of Servers Percent
1.986--7,05621.37%
5.10--2,6127.91%
4.26--2,2526.82%
6.5--1,3173.99%
6.0--1,2913.91%
1.981--1,2373.75%
1.983--7802.36%
0-3.63-6962.11%
6.03--6361.93%
3.62--6141.86%
5.51--6071.84%
5.11--5241.59%
6.60--5011.52%
6.53--4561.38%
0-1.87-3671.11%
Other12,06636.55%

MDaemon (20,086 servers)

Version Number of Servers Percent
13.0.22,65413.21%
11.0.32,0059.98%
11.0.01,2726.33%
12.5.61,2446.19%
13.0.18214.09%
10.0.07773.87%
10.1.26923.45%
10.1.16293.13%
12.5.45472.72%
13.0.05172.57%
9.6.14992.48%
9.6.64652.32%
10.1.04282.13%
12.5.33861.92%
12.0.33681.83%
12.5.73131.56%
12.5.83061.52%
9.6.22951.47%
9.5.22761.37%
10.0.52611.30%
9.6.52591.29%
12.0.42471.23%
10.0.22461.22%
12.5.22361.17%
9.6.42221.11%
9.5.62171.08%
9.5.12141.07%
Other3,69018.37%

IMail (7,272 servers)

Version Number of Servers Percent
8.221,29817.85%
11.586811.94%
12.1.0.2706338.70%
9.234586.30%
8.154406.05%
11.033985.47%
11.013564.90%
12.2.0.1693374.63%
8.052873.95%
10.022122.92%
12.0.0.3841972.71%
7.071642.26%
7.151261.73%
6.061231.69%
11.01201.65%
8.001181.62%
11.021121.54%
10.011101.51%
12.0.0.3481011.39%
9.21801.10%
9.10741.02%
Other6609.08%

Lotus Domino (4,354 servers)

Version Number of Servers Percent
8.5.378818.10%
8.5.23157.23%
8.5.3FP22896.64%
8.5.3FP12295.26%
8.5.2FP22285.24%
8.5.12054.71%
7.0.21824.18%
8.51483.40%
8.5.2FP31323.03%
8.5.2FP41042.39%
7.0.31042.39%
8.5.1FP5952.18%
8.5.2FP1861.98%
8.0.1821.88%
7.0.1811.86%
6.5.3751.72%
8.0.2751.72%
6.5.4741.70%
7.0711.63%
6.5.1681.56%
8.0611.40%
6.5.5491.13%
6.5481.10%
8.5.1FP4451.03%
8.5.1FP3451.03%
Other67515.50%

WinWebMail (3,156 servers)

Version Number of Servers Percent
3.8.1.362119.68%
3.8.0.142413.43%
3.7.6.134410.90%
3.8.1.52929.25%
3.8.2.12718.59%
3.7.3.12477.83%
3.8.1.12277.19%
3.7.7.32156.81%
3.7.1.11203.80%
3.7.5.1882.79%
3.7.7.1561.77%
3.6.3.1531.68%
3.8.3.1521.65%
3.7.0.3461.46%
3.7.0.5441.39%
3.7.0.7351.11%
Other210.67%

CommuniGate Pro (3,068 servers)

Version Number of Servers Percent
5.1.162608.47%
4.1.81274.14%
5.4.41264.11%
5.4.81244.04%
5.4.61193.88%
5.2.201023.32%
5.4.71003.26%
5.4.5902.93%
5.3.13892.90%
5.4.1762.48%
4.2.10742.41%
5.2.16722.35%
5.1.12632.05%
5.4.3622.02%
5.3.15622.02%
5.0.14611.99%
5.2.19601.96%
5.2.3601.96%
5.4.2551.79%
5.2.14481.56%
5.2.12391.27%
5.4.0371.21%
5.1.13371.21%
5.3.9361.17%
5.3.8361.17%
5.2.13341.11%
5.3.10331.08%
5.4331.08%
5.2.8321.04%
Other92130.02%

XMail (2,080 servers)

Version Number of Servers Percent
1.2755726.78%
1.2250224.13%
1.2535817.21%
1.2623811.44%
1.241597.64%
1.21733.51%
1.23452.16%
1.20331.59%
1.17321.54%
Other833.99%

Kerio (1,591 servers)

Version Number of Servers Percent
6.7.325916.28%
6.6.216310.25%
6.7.01519.49%
6.5.01227.67%
6.5.21026.41%
6.7.2955.97%
6.4.1925.78%
6.7.1784.90%
6.3.1704.40%
6.6.1563.52%
6.4.0553.46%
6.6.0543.39%
6.5.1472.95%
6.4.2352.20%
6.3.0301.89%
6.1.4181.13%
6.0.10181.13%
6.2.0171.07%
6.2.2161.01%
Other1137.10%

Qmail Toaster (1,586 servers)

Version Number of Servers Percent
1.31,50194.64%
1.2523.28%
Other332.08%

Merak (1,199 servers)

Version Number of Servers Percent
8.0.347039.20%
8.9.113611.34%
8.5.0857.09%
7.5.2554.59%
8.3.8514.25%
7.6.4504.17%
7.4.5484.00%
9.0.0242.00%
7.4.2231.92%
7.6.1171.42%
7.0.1171.42%
8.9.0161.33%
7.2.0151.25%
4.4.2141.17%
8.2.4141.17%
6.2.1141.17%
8.3.15131.08%
Other13711.43%

SurgeSMTP (1,025 servers)

Version Number of Servers Percent
6.1c-119118.63%
5.3h2-213413.07%
5.2a-1939.07%
3.9e-1585.66%
6.2c-1514.98%
6.0a5-5474.59%
3.8k4-4333.22%
6.0a4-4333.22%
4.0u4-4242.34%
5.0e4-4181.76%
4.2d2-2181.76%
4.3g2-2171.66%
3.8i3-3151.46%
5.0e3-3131.27%
3.9h-18131.27%
5.3h-1121.17%
6.0a3-3121.17%
3.6f5-5121.17%
6.2a-1111.07%
4.2d4-4111.07%
Other20920.39%

ArGoSoft (713 servers)

Version Number of Servers Percent
1.8 (1.8.9.6)17424.40%
1.8 (1.8.9.5)9913.88%
1.8 (1.8.9.3)9012.62%
1.8 (1.8.9.1)7510.52%
1.8 (1.8.8.8)517.15%
1.8 (1.8.8.7)415.75%
1.8 (1.8.9.2)233.23%
1.8 (1.8.9.4)212.95%
1.8 (1.8.8.9)131.82%
1.8 (1.8.6.0)131.82%
1.8 (1.8.8.1)101.40%
Other10314.45%

GroupWise (517 servers)

Version Number of Servers Percent
8.0.210019.34%
7.0.39518.38%
6.5.75610.83%
7.0.4397.54%
7.0.2346.58%
7.0.1224.26%
8.0.1214.06%
6.5.4203.87%
6.5.6193.68%
6.0.4163.09%
8.0.3142.71%
6.5.1132.51%
12.0.1132.51%
12.0.0101.93%
8.0.091.74%
7.081.55%
6.5.571.35%
Other214.06%

Gordano Messaging Suite (GMS) (336 servers)

Version Number of Servers Percent
Other336100.00%

Post.Office (335 servers)

Version Number of Servers Percent
3.5.34914.63%
4.1.2.4298.66%
4.1.0.2298.66%
4.0.1236.87%
4.1.1164.78%
3.8.3113.28%
3.5.3J113.28%
4.2102.99%
3.9.292.69%
3.9.2.392.69%
4.1.0.392.69%
3.1.2J82.39%
3.1.282.39%
4.1.0.482.39%
3.8.7.472.09%
4.0.1.172.09%
3.9.1.261.79%
3.6.261.79%
4.1.2.251.49%
3.9.151.49%
4.1.2.351.49%
4.0.0.151.49%
3.9.2.141.19%
4.0.0.241.19%
3.9.1.341.19%
4.2.141.19%
4.2.1.141.19%
4.141.19%
3.9.2.241.19%
4.2.1.341.19%
Other288.36%

Trend Micro (333 servers)

Version Number of Servers Percent
5.713540.54%
5.58324.92%
5.185416.22%
7.0329.61%
7.1195.71%
Other103.00%

MagicMail (307 servers)

Version Number of Servers Percent
Other307100.00%

Mirapoint (163 servers)

Version Number of Servers Percent
3.10.10a-GA1911.66%
4.1.10-GA159.20%
4.2.3-GA116.75%
4.3.5-GA95.52%
3.10.9-GA95.52%
4.1.9-GA84.91%
3.10.5-GA84.91%
4.2.4-GA74.29%
3.10.8-GA74.29%
4.1.4-GA63.68%
4.3.3-GA63.68%
3.10.7-GA53.07%
3.8.5-GA53.07%
4.1.3-GA53.07%
3.8.3-GA53.07%
3.8.4-GA53.07%
4.1.8-GA42.45%
4.3.4-GA42.45%
3.8.7a31.84%
4.1.5-GA31.84%
3.8.6-GA21.23%
3.10.2-GA21.23%
4.0.5a21.23%
3.7.5a-GA21.23%
3.10.4-GA21.23%
3.10.3-GA21.23%
Other74.29%

InterScan VirusWall (128 servers)

Version Number of Servers Percent
Other128100.00%

VisNetic (123 servers)

Version Number of Servers Percent
9.3.2.03730.08%
9.1.4.11713.82%
8.5.0.886.50%
5.5.8.364.88%
7.6.1.064.88%
8.0.354.07%
5.0.2.343.25%
8.0.3.043.25%
8.0.3.143.25%
5.8.6.632.44%
7.2.4.132.44%
9.1.4.032.44%
5.4.5.432.44%
6.2.2.021.63%
5.8.6.421.63%
5.0.2.121.63%
5.3.5.021.63%
Other129.76%

Mercury (46 servers)

Version Number of Servers Percent
1.482350.00%
3.321430.43%
3.01a24.35%
1.4724.35%
3.21c24.35%
3.2112.17%
4.x12.17%
3.3012.17%
Other00.00%

Interscan (43 servers)

Version Number of Servers Percent
3.55 (build 1016)1125.58%
3.81-Build_1022818.60%
3.55 (build 1029)511.63%
3.8-Build_301336.98%
3.53 (build 2017)36.98%
3.81-Build_108436.98%
3.53 (build 1493)24.65%
3.53 (build 2013)24.65%
3.5 (build 1294)12.33%
3.51 (build 1337)12.33%
3.55 (build 1020)12.33%
3.8-Build_304512.33%
3.53 (build 2011)12.33%
3.8-Build_108012.33%
Other00.00%

NetIQ MailMarshal (34 servers)

Version Number of Servers Percent
6.0.3.82367.65%
5.5.6.7411.76%
5.5.6.525.88%
5.5.6.625.88%
5.5.5.612.94%
6.1.3.1512.94%
5.5.4.1612.94%
Other00.00%

WebSTAR V (31 servers)

Version Number of Servers Percent
5.4.11651.61%
5.4.0722.58%
5.3.339.68%
5.3.439.68%
5.3.226.45%
Other00.00%

Neon Mail Server (26 servers)

Version Number of Servers Percent
3.0.7623.08%
3.1.3519.23%
3.1.0415.38%
3.1.4311.54%
3.1.2311.54%
3.0.927.69%
3.1.113.85%
3.1.513.85%
3.0.613.85%
Other00.00%

OpenVMS (20 servers)

Version Number of Servers Percent
8.31050.00%
8.4630.00%
7.3315.00%
8.215.00%
Other00.00%

MessageWall (17 servers)

Version Number of Servers Percent
1.0.81694.12%
1.0.615.88%
Other00.00%

OpenSMTPD (16 servers)

Version Number of Servers Percent
Other16100.00%

ModusMail (14 servers)

Version Number of Servers Percent
4.35.477.0642.86%
4.35.480.0214.29%
4.1.361.2117.14%
3.2.315.017.14%
4.0.340.317.14%
4.3.459.017.14%
4.35.477.817.14%
3.1.302.017.14%
Other00.00%

WebSTAR (14 servers)

Version Number of Servers Percent
Other14100.00%

MAILsweeper (3 servers)

Version Number of Servers Percent
4.3.17.0266.67%
4.3.20.0133.33%
Other00.00%




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