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Mail (MX) Server Survey
October 1st, 2014

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 Queried2,368,333   100.0%
Number of Servers that didn't respond398,54316.83%
    Server didn't open socket389,77216.46%
    Server didn't provide banner8,7710.37%
Server provided banner1,969,79083.17%
Server banner identifies software in use1,113,89847.03%

As indicated by the above table, of the 2,368,333 servers queried, only 1,113,898 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
Exim583,52152.39%
Postfix327,73529.42%
Sendmail92,2098.28%
Microsoft42,0303.77%
MailEnable30,3262.72%
MDaemon18,2681.64%
IMail4,7120.42%
Lotus Domino2,7830.25%
CommuniGate Pro2,6880.24%
WinWebMail1,9200.17%
XMail1,7120.15%
Qmail Toaster1,3210.12%
Kerio9630.09%
SurgeSMTP9060.08%
Merak7070.06%
ArGoSoft4300.04%
MagicMail2950.03%
Post.Office2660.02%
GroupWise2480.02%
Gordano Messaging Suite (GMS)2300.02%
Trend Micro1710.02%
OpenSMTPD1150.01%
InterScan VirusWall800.01%
Mirapoint690.01%
VisNetic540.00%
Mercury270.00%
OpenVMS210.00%
Interscan200.00%
WebSTAR V190.00%
Neon Mail Server150.00%
NetIQ MailMarshal130.00%
ModusMail100.00%
MessageWall70.00%
MAILsweeper40.00%
WebSTAR30.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (583,521 servers)

Version Number of Servers Percent
4.82457,76578.45%
4.80.127,9704.79%
4.8024,1254.13%
4.7618,9293.24%
4.7216,0522.75%
4.6910,3031.77%
4.776,8481.17%
Other21,5293.69%

Postfix (327,735 servers)

Version Number of Servers Percent
Other327,735100.00%

Sendmail (92,209 servers)

Version Number of Servers Percent
8.13.820,92122.69%
8.14.518,90920.51%
8.14.414,87116.13%
8.13.112,20713.24%
8.14.36,8887.47%
8.12.11.200603082,4092.61%
8.13.6.200606142,4032.61%
8.14.71,6671.81%
8.14.21,3191.43%
8.11.61,1351.23%
8.12.101,0831.17%
8.14.19631.04%
Other7,4348.06%

Microsoft (42,030 servers)

Version Number of Servers Percent
6.0.3790.467532,77177.97%
6.0.3790.39593,6408.66%
7.5.7601.175142,0904.97%
6.0.3790.18309812.33%
7.0.6002.182644441.06%
5.0.2195.73814281.02%
Other1,6763.99%

MailEnable (30,326 servers)

Version Number of Servers Percent
1.986--2,8389.36%
6.5--2,2537.43%
5.10--1,4004.62%
8.04--1,0673.52%
6.0--1,0103.33%
4.26--1,0043.31%
8.51--9193.03%
8.00--8552.82%
7.06--8262.72%
8.50--7592.50%
7.50--5581.84%
7.07--5421.79%
1.981--5331.76%
7.0--4831.59%
6.57--4801.58%
7.53--4781.58%
6.70--4471.47%
6.03--3381.11%
Other13,53644.63%

MDaemon (18,268 servers)

Version Number of Servers Percent
14.0.32,53813.89%
14.0.21,4117.72%
11.0.31,0825.92%
11.0.09815.37%
13.0.48704.76%
13.0.57874.31%
13.5.16543.58%
10.0.04912.69%
13.6.24882.67%
12.5.64872.67%
14.0.04812.63%
13.6.03832.10%
10.1.23802.08%
10.1.13331.82%
13.5.23321.82%
12.5.43311.81%
13.0.32831.55%
9.6.12801.53%
10.1.02731.49%
13.6.12641.45%
9.6.62521.38%
13.0.22501.37%
9.6.22391.31%
Other4,39824.07%

IMail (4,712 servers)

Version Number of Servers Percent
12.3.0.10062613.29%
8.2250510.72%
12.2.0.2354349.21%
12.4.1.153417.24%
9.232916.18%
11.52916.18%
8.152495.28%
8.052094.44%
12.4.0.1661873.97%
11.031423.01%
12.4.1.91352.87%
11.011352.87%
10.02992.10%
12.1.0.270992.10%
11.02931.97%
7.15831.76%
6.06771.63%
7.07671.42%
12.2.0.169571.21%
8.00521.10%
10.01481.02%
Other49210.44%

Lotus Domino (2,783 servers)

Version Number of Servers Percent
8.5.346416.67%
8.5.3FP61736.22%
8.5.21485.32%
8.5.3FP31435.14%
8.5.11144.10%
8.5.3FP41124.02%
8.5.3FP21083.88%
7.0.21003.59%
8.5.3FP5923.31%
8.5832.98%
8.5.2FP2802.87%
8.5.2FP3802.87%
8.5.3FP1732.62%
8.5.2FP4712.55%
7.0.3551.98%
8.5.1FP5461.65%
7.0.1411.47%
7.0401.44%
6.5.3401.44%
8.5.2FP1381.37%
6.5.1381.37%
8.0.1371.33%
6.5.4341.22%
8.0341.22%
8.0.2341.22%
6.5301.08%
Other47517.07%

CommuniGate Pro (2,688 servers)

Version Number of Servers Percent
6.0.934612.87%
5.1.162639.78%
6.0.71314.87%
6.0.81274.72%
5.2.20953.53%
4.1.8843.12%
5.4.11772.86%
6.0.5742.75%
5.3.13592.19%
5.0.14521.93%
4.2.10501.86%
5.2.19481.79%
5.2.3471.75%
5.1.12431.60%
5.3.15421.56%
5.4.4411.53%
5.4.8381.41%
5.4.1381.41%
5.2.16371.38%
6.0.1361.34%
5.4.6341.26%
5.4.5311.15%
5.4.10311.15%
6.0.4271.00%
6.0.6271.00%
Other81030.13%

WinWebMail (1,920 servers)

Version Number of Servers Percent
3.8.1.333917.66%
3.8.0.11809.38%
3.7.6.11749.06%
3.8.1.51387.19%
3.9.0.11367.08%
3.8.6.11166.04%
3.8.1.11125.83%
3.8.5.11045.42%
3.7.3.11035.36%
3.7.7.3844.38%
3.9.0.7572.97%
3.7.1.1562.92%
3.8.2.1552.86%
3.9.0.5371.93%
3.7.5.1341.77%
3.8.3.1341.77%
3.8.3.3261.35%
3.7.0.3241.25%
3.7.0.5241.25%
3.7.0.7201.04%
Other673.49%

XMail (1,712 servers)

Version Number of Servers Percent
1.2757633.64%
1.2246427.10%
1.2523413.67%
1.261679.75%
1.24985.72%
1.21482.80%
1.23261.52%
1.20201.17%
1.17191.11%
Other603.50%

Qmail Toaster (1,321 servers)

Version Number of Servers Percent
1.31,24994.55%
1.2342.57%
Other382.88%

Kerio (963 servers)

Version Number of Servers Percent
6.7.318118.80%
6.7.09910.28%
6.6.2868.93%
6.5.2747.68%
6.5.0707.27%
6.7.2575.92%
6.4.1535.50%
6.3.1444.57%
6.6.1424.36%
6.7.1424.36%
6.3.0262.70%
6.5.1262.70%
6.4.0252.60%
6.4.2232.39%
6.6.0151.56%
6.2.0111.14%
6.1.3111.14%
6.0.10101.04%
Other687.06%

SurgeSMTP (906 servers)

Version Number of Servers Percent
6.5a2-221824.06%
6.5a-1909.93%
6.3c2-2717.84%
6.4a-1657.17%
5.2a-1434.75%
6.7a-1394.30%
5.3h2-2353.86%
6.7b-13323.53%
6.1c-1293.20%
3.9e-1262.87%
3.8k4-4192.10%
4.0u4-4161.77%
6.0a5-5131.43%
6.7b-30111.21%
Other19921.96%

Merak (707 servers)

Version Number of Servers Percent
8.0.324234.23%
8.9.19513.44%
8.5.0527.36%
8.3.8436.08%
7.5.2365.09%
7.4.5344.81%
7.6.4294.10%
7.6.1141.98%
7.2.0131.84%
7.4.2111.56%
7.0.1111.56%
8.3.15111.56%
8.9.0101.41%
9.0.0101.41%
8.2.481.13%
Other8812.45%

ArGoSoft (430 servers)

Version Number of Servers Percent
1.8 (1.8.9.6)11326.28%
1.8 (1.8.9.3)6114.19%
1.8 (1.8.9.5)6013.95%
1.8 (1.8.9.1)399.07%
1.8 (1.8.8.7)266.05%
1.8 (1.8.8.8)245.58%
1.8 (1.8.9.2)153.49%
1.8 (1.8.9.4)122.79%
1.8 (1.8.6.0)102.33%
1.8 (1.8.8.9)71.63%
1.8 (1.8.7.3)71.63%
Other5613.02%

MagicMail (295 servers)

Version Number of Servers Percent
Other295100.00%

Post.Office (266 servers)

Version Number of Servers Percent
3.5.33713.91%
4.1.2.43412.78%
4.2.23412.78%
4.1.0.2176.39%
4.1.1134.89%
4.0.1124.51%
3.9.2.3103.76%
3.5.3J93.38%
4.1.0.383.01%
4.2.1.383.01%
4.262.26%
3.1.2J62.26%
4.2.1.162.26%
3.1.251.88%
4.1.2.351.88%
3.8.7.451.88%
3.5.441.50%
4.1.0.441.50%
3.5.141.50%
3.9.231.13%
4.2.1.231.13%
3.5.231.13%
3.9.1.231.13%
4.1.2.231.13%
3.9.131.13%
Other217.89%

GroupWise (248 servers)

Version Number of Servers Percent
7.0.34116.53%
8.0.23012.10%
7.0.4249.68%
6.5.7249.68%
8.0.3218.47%
12.0.2176.85%
14.0.0135.24%
7.0.2124.84%
6.5.6104.03%
6.5.493.63%
7.0.162.42%
6.0.452.02%
14.0.152.02%
8.0.141.61%
6.5.541.61%
8.0.041.61%
12.0.131.21%
Other166.45%

Gordano Messaging Suite (GMS) (230 servers)

Version Number of Servers Percent
Other230100.00%

Trend Micro (171 servers)

Version Number of Servers Percent
5.76739.18%
5.53520.47%
5.182916.96%
7.0148.19%
7.1116.43%
8.542.34%
3.5331.75%
5.1521.17%
Other63.51%

OpenSMTPD (115 servers)

Version Number of Servers Percent
Other115100.00%

InterScan VirusWall (80 servers)

Version Number of Servers Percent
Other80100.00%

Mirapoint (69 servers)

Version Number of Servers Percent
4.3.5-GA1014.49%
4.4.3-GA710.14%
4.3.6-GA68.70%
4.4.2a-FCS57.25%
4.4.5-GA45.80%
4.4.4-GA45.80%
4.1.10-GA45.80%
3.10.10a-GA34.35%
4.3.7-GA34.35%
3.10.4-GA22.90%
4.2.3-GA22.90%
4.1.9-GA22.90%
4.3.3-GA22.90%
4.4.4b-GA22.90%
4.1.5-GA22.90%
3.10.7-GA22.90%
3.8.4-GA22.90%
4.1.3-GA11.45%
4.2.4-GA11.45%
4.1.6-GA11.45%
3.7.5a-GA11.45%
3.8.7a11.45%
3.10.2-GA11.45%
4.1.8-GA11.45%
Other00.00%

VisNetic (54 servers)

Version Number of Servers Percent
9.3.2.01527.78%
9.1.4.159.26%
8.0.3.147.41%
8.5.0.847.41%
7.2.4.135.56%
6.2.2.035.56%
8.3.5.023.70%
5.0.2.323.70%
9.1.4.023.70%
5.5.8.323.70%
5.3.5.023.70%
8.0.311.85%
8.3.0.111.85%
8.5.0.511.85%
5.4.5.411.85%
8.0.3.011.85%
5.4.511.85%
7.6.1.011.85%
5.0.2.011.85%
5.8.6.611.85%
9.1.4.1 provided by Techfount Systems Pte Ltd11.85%
Other00.00%

Mercury (27 servers)

Version Number of Servers Percent
3.321244.44%
1.481244.44%
3.2113.70%
3.21c13.70%
4.x13.70%
Other00.00%

OpenVMS (21 servers)

Version Number of Servers Percent
8.3838.10%
8.4628.57%
7.3628.57%
8.214.76%
Other00.00%

Interscan (20 servers)

Version Number of Servers Percent
3.55 (build 1016)420.00%
3.81-Build_1084315.00%
3.81-Build_1022315.00%
3.8-Build_3013210.00%
3.55 (build 1029)210.00%
3.53 (build 1493)210.00%
3.5 (build 1294)15.00%
3.55 (build 1020)15.00%
3.53 (build 2013)15.00%
3.8-Build_108015.00%
Other00.00%

WebSTAR V (19 servers)

Version Number of Servers Percent
5.4.1947.37%
5.4.0736.84%
5.3.4210.53%
5.3.315.26%
Other00.00%

Neon Mail Server (15 servers)

Version Number of Servers Percent
3.0.7426.67%
3.1.4320.00%
3.1.2213.33%
3.1.0213.33%
3.1.316.67%
3.0.616.67%
3.0.816.67%
3.0.916.67%
Other00.00%

NetIQ MailMarshal (13 servers)

Version Number of Servers Percent
6.0.3.8861.54%
5.5.6.5215.38%
5.5.5.617.69%
5.5.4.1717.69%
5.5.6.717.69%
Other00.00%

ModusMail (10 servers)

Version Number of Servers Percent
4.35.477.0660.00%
4.1.361.21110.00%
3.2.315.0110.00%
4.35.477.8110.00%
3.1.302.0110.00%
Other00.00%

MessageWall (7 servers)

Version Number of Servers Percent
1.0.8685.71%
1.0.6114.29%
Other00.00%

MAILsweeper (4 servers)

Version Number of Servers Percent
4.3.17.0250.00%
4.3.19.0125.00%
4.3.20.0125.00%
Other00.00%

WebSTAR (3 servers)

Version Number of Servers Percent
Other3100.00%




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