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Mail (MX) Server Survey
May 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 Queried1,933,004   100.0%
Number of Servers that didn't respond312,83316.18%
    Server didn't open socket300,52515.55%
    Server didn't provide banner12,3080.64%
Server provided banner1,620,17183.82%
Server banner identifies software in use921,18047.66%

As indicated by the above table, of the 1,933,004 servers queried, only 921,180 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
Exim251,64127.32%
Sendmail197,43921.43%
Microsoft194,10621.07%
Postfix168,25218.26%
MailEnable27,0752.94%
MDaemon22,7812.47%
IMail17,2551.87%
Kerio6,6720.72%
Lotus Domino5,8570.64%
WinWebMail5,2210.57%
CommuniGate Pro4,3270.47%
Merak4,1600.45%
XMail2,6260.29%
GroupWise2,0830.23%
ArGoSoft1,9960.22%
Qmail Toaster1,7800.19%
Trend Micro1,7730.19%
SurgeSMTP1,5690.17%
Gordano Messaging Suite (GMS)7950.09%
Post.Office6830.07%
Mirapoint5060.05%
InterScan VirusWall4530.05%
VisNetic4380.05%
MagicMail4090.04%
NetIQ MailMarshal3260.04%
Interscan2660.03%
Neon Mail Server1730.02%
WebSTAR V1350.01%
Mercury1260.01%
ModusMail730.01%
MessageWall580.01%
WebSTAR520.01%
MAILsweeper490.01%
OpenVMS250.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (251,641 servers)

Version Number of Servers Percent
4.69196,23477.98%
4.6318,0607.18%
4.6711,9214.74%
4.685,5162.19%
4.664,4621.77%
4.603,8651.54%
4.503,0781.22%
4.622,8341.13%
Other5,6712.25%

Sendmail (197,439 servers)

Version Number of Servers Percent
8.13.134,91117.68%
8.13.820,57310.42%
8.12.11.2006061419,5649.91%
8.12.11.2006030817,2138.72%
8.13.617,0798.65%
8.14.312,4816.32%
8.13.6.2006061410,7815.46%
8.12.109,0204.57%
8.12.118,9244.52%
8.11.68,7744.44%
8.14.17,1603.63%
8.14.26,6393.36%
8.13.44,8842.47%
8.13.74,3312.19%
8.12.83,7301.89%
8.9.32,1621.10%
Other9,2134.67%

Microsoft (194,106 servers)

Version Number of Servers Percent
6.0.3790.3959156,09780.42%
6.0.3790.183022,13011.40%
5.0.2195.671310,5865.45%
6.0.3790.2112,5321.30%
Other2,7611.42%

Postfix (168,252 servers)

Version Number of Servers Percent
Other168,252100.00%

MailEnable (27,075 servers)

Version Number of Servers Percent
1.986--5,78021.35%
1.981--4,79917.72%
1.983--3,03711.22%
1.96--1,0453.86%
1.95--9953.67%
0-3.6-8543.15%
1.9--7982.95%
1.8--6092.25%
3.62--5692.10%
0-3.61-5502.03%
0-3.14-5281.95%
0-2.37-5081.88%
--3.64001.48%
--3.613941.46%
0-1.85-3901.44%
0-1.87-3581.32%
0-3.53-3561.31%
0-2.53-3261.20%
Other4,77917.65%

MDaemon (22,781 servers)

Version Number of Servers Percent
10.0.45,17522.72%
9.6.61,3425.89%
9.6.11,2905.66%
10.0.01,1765.16%
9.6.51,0804.74%
10.0.29414.13%
9.5.27853.45%
9.6.47253.18%
8.1.37033.09%
9.6.26943.05%
9.5.66692.94%
9.0.45942.61%
9.5.15932.60%
10.0.15672.49%
10.0.35212.29%
9.6.34301.89%
7.2.33771.65%
6.8.53731.64%
7.2.03241.42%
9.0.13181.40%
9.5.52671.17%
9.0.02541.11%
Other3,58315.73%

IMail (17,255 servers)

Version Number of Servers Percent
8.223,39819.69%
10.022,19212.70%
8.151,82610.58%
9.231,3397.76%
8.059415.45%
9.107344.25%
10.016423.72%
7.076273.63%
9.206113.54%
9.215223.03%
7.154812.79%
6.064132.39%
8.004022.33%
9.223962.29%
8.043231.87%
10.03131.81%
8.213001.74%
8.102121.23%
8.012081.21%
8.201761.02%
Other1,1996.95%

Kerio (6,672 servers)

Version Number of Servers Percent
6.6.22,25433.78%
6.5.268310.24%
6.5.05127.67%
6.6.04697.03%
6.6.13905.85%
6.4.13735.59%
6.3.13284.92%
6.5.13274.90%
6.4.02453.67%
6.4.22123.18%
6.3.01442.16%
Other73511.02%

Lotus Domino (5,857 servers)

Version Number of Servers Percent
7.0.25389.19%
8.54657.94%
8.0.24367.44%
8.0.14016.85%
7.0.33596.13%
6.5.42975.07%
7.0.12834.83%
6.5.12303.93%
7.0.2FP22223.79%
6.5.32173.70%
7.0.3FP12173.70%
6.5.51853.16%
8.01773.02%
7.01752.99%
6.51682.87%
6.5.2981.67%
5.0.11971.66%
7.0.2FP1961.64%
8.0.2FP1731.25%
7.0.2FP3721.23%
6.5.6681.16%
5.0.12611.04%
Other92215.74%

WinWebMail (5,221 servers)

Version Number of Servers Percent
3.7.6.11,23023.56%
3.7.3.11,00219.19%
3.7.7.390317.30%
3.7.1.154510.44%
3.7.5.13406.51%
3.6.3.12745.25%
3.7.7.12344.48%
3.7.0.52244.29%
3.7.0.31613.08%
3.7.0.71573.01%
3.8.0.11031.97%
Other480.92%

CommuniGate Pro (4,327 servers)

Version Number of Servers Percent
4.1.83257.51%
5.2.122686.19%
5.2.132385.50%
5.1.132084.81%
4.2.102024.67%
5.1.161734.00%
5.2.81703.93%
5.1.121393.21%
5.2.101383.19%
5.2.111292.98%
5.2.31172.70%
5.1.141032.38%
5.0.13942.17%
5.2.6912.10%
5.0.9912.10%
5.0.14882.03%
5.2.9872.01%
5.2.5791.83%
5.2.0771.78%
5.1.9691.59%
5.2.1551.27%
5.1.10521.20%
5.1.7521.20%
4.2.8511.18%
4.2501.16%
5.1.8501.16%
5.1.11481.11%
5.2.7481.11%
4.2.9471.09%
Other98822.83%

Merak (4,160 servers)

Version Number of Servers Percent
8.0.31,71541.23%
8.9.13959.50%
8.5.02485.96%
7.4.52255.41%
7.6.41924.62%
7.5.21844.42%
8.3.81764.23%
7.4.2872.09%
9.0.0811.95%
7.2.0611.47%
6.2.1521.25%
7.6.1511.23%
8.2.4501.20%
8.2.13481.15%
Other59514.30%

XMail (2,626 servers)

Version Number of Servers Percent
1.2575328.67%
1.2271627.27%
1.2447418.05%
1.211997.58%
1.17963.66%
1.20943.58%
1.23843.20%
1.12692.63%
1.16321.22%
Other1094.15%

GroupWise (2,083 servers)

Version Number of Servers Percent
7.0.368532.89%
7.0.233416.03%
6.5.725012.00%
7.0.11597.63%
6.5.41396.67%
8.0.0894.27%
6.5.6874.18%
6.0.4753.60%
6.5.1602.88%
6.5.5462.21%
7.0442.11%
Other1155.52%

ArGoSoft (1,996 servers)

Version Number of Servers Percent
1.8 (1.8.9.5)40820.44%
1.8 (1.8.9.3)29914.98%
1.8 (1.8.9.1)22011.02%
1.8 (1.8.8.8)1547.72%
1.8 (1.8.8.7)1487.41%
1.8 (1.8.9.6)1346.71%
1.8 (1.8.9.2)974.86%
1.8 (1.8.9.4)582.91%
1.8 (1.8.8.9)512.56%
1.8 (1.8.8.1)402.00%
1.8 (1.8.9.0)371.85%
1.8 (1.8.6.0)281.40%
1.8 (1.8.8.2)261.30%
Other29614.83%

Qmail Toaster (1,780 servers)

Version Number of Servers Percent
1.31,52285.51%
1.219110.73%
1.0462.58%
Other211.18%

Trend Micro (1,773 servers)

Version Number of Servers Percent
5.784947.88%
5.554730.85%
5.1825114.16%
7.0955.36%
Other311.75%

SurgeSMTP (1,569 servers)

Version Number of Servers Percent
3.9e-153934.35%
3.9c-11509.56%
3.8k4-41429.05%
3.9g2-21257.97%
3.7b8-8593.76%
3.8f3-3583.70%
3.8i3-3483.06%
3.6f5-5422.68%
3.5b3-3382.42%
3.8f2-2281.78%
3.9h-65261.66%
3.0c2-2231.47%
4.0a-1211.34%
3.8k2-2181.15%
Other25216.06%

Gordano Messaging Suite (GMS) (795 servers)

Version Number of Servers Percent
Other795100.00%

Post.Office (683 servers)

Version Number of Servers Percent
3.5.315722.99%
4.1.0.27010.25%
4.0.1669.66%
3.5.3J446.44%
3.8.3365.27%
3.6.3233.37%
3.9.1223.22%
3.6.2223.22%
3.9.2.3213.07%
3.1.2J213.07%
3.1.2172.49%
3.9.2142.05%
3.8.7.4142.05%
3.9.0131.90%
3.5.2111.61%
3.8.4111.61%
4.1101.46%
3.9.1.391.32%
3.9.2.191.32%
3.8.581.17%
4.0.0.281.17%
3.9.1.271.02%
3.6.071.02%
4.0.0.171.02%
4.0.1.171.02%
Other497.17%

Mirapoint (506 servers)

Version Number of Servers Percent
3.8.4-GA8717.19%
3.8.3-GA7214.23%
3.8.7a438.50%
3.10.4-GA428.30%
3.8.6-GA367.11%
3.10.3-GA275.34%
4.1.3-GA234.55%
3.7.5a-GA234.55%
3.8.2-GA224.35%
3.8.5-GA214.15%
3.7.3a-GA163.16%
4.0.5a142.77%
3.10.2-GA132.57%
3.7.4b-GA132.57%
4.1.4-GA71.38%
4.1.5-GA71.38%
3.10.5-GA61.19%
Other346.72%

InterScan VirusWall (453 servers)

Version Number of Servers Percent
Other453100.00%

VisNetic (438 servers)

Version Number of Servers Percent
9.3.2.013129.91%
9.1.4.16414.61%
5.8.6.6214.79%
8.5.0.8204.57%
5.0.2.3163.65%
5.5.8.3153.42%
6.2.2.0153.42%
9.1.4.0143.20%
8.0.3.1143.20%
7.2.4.1132.97%
8.0.3.0122.74%
8.3.5.0102.28%
8.0.3102.28%
5.3.5.092.05%
7.6.1.081.83%
5.4.5.471.60%
8.3.671.60%
5.8.6.461.37%
6.0.9.051.14%
Other419.36%

MagicMail (409 servers)

Version Number of Servers Percent
Other409100.00%

NetIQ MailMarshal (326 servers)

Version Number of Servers Percent
6.0.3.825879.14%
5.5.6.7185.52%
6.1.3.15185.52%
5.5.4.1661.84%
5.5.6.651.53%
5.5.6.551.53%
5.5.4.1741.23%
Other123.68%

Interscan (266 servers)

Version Number of Servers Percent
3.55 (build 1016)5319.92%
3.8-Build_30134918.42%
3.81-Build_10223412.78%
3.53 (build 2017)228.27%
3.55 (build 1029)228.27%
3.53 (build 2011)134.89%
3.81-Build_1084124.51%
3.55 (build 1020)103.76%
3.53 (build 1493)103.76%
3.53 (build 2013)93.38%
3.52 (build 1375)72.63%
3.8-Build_306531.13%
Other228.27%

Neon Mail Server (173 servers)

Version Number of Servers Percent
3.1.34425.43%
3.1.43117.92%
3.0.72715.61%
3.0.92313.29%
3.1.0169.25%
3.1.2158.67%
3.1.595.20%
3.0.831.73%
3.1.121.16%
3.0.621.16%
Other10.58%

WebSTAR V (135 servers)

Version Number of Servers Percent
5.4.14432.59%
5.4.03626.67%
5.3.43223.70%
5.3.3107.41%
5.3.296.67%
5.3.121.48%
Other21.48%

Mercury (126 servers)

Version Number of Servers Percent
1.486148.41%
3.323830.16%
3.21c97.14%
1.4753.97%
3.3153.97%
3.2121.59%
1.4921.59%
Other43.17%

ModusMail (73 servers)

Version Number of Servers Percent
3.2.315.01621.92%
4.35.480.01115.07%
4.35.477.01013.70%
4.35.480.1168.22%
3.1.302.068.22%
4.2.420.068.22%
4.3.459.056.85%
4.1.361.2134.11%
4.2.425.422.74%
3.1.293.122.74%
4.2.425.2211.37%
4.1.361.011.37%
4.0.340.311.37%
4.0.330.811.37%
1.4.232.011.37%
4.35.477.811.37%
Other00.00%

MessageWall (58 servers)

Version Number of Servers Percent
1.0.84170.69%
1.0.111424.14%
1.1.023.45%
1.0.611.72%
Other00.00%

WebSTAR (52 servers)

Version Number of Servers Percent
Other52100.00%

MAILsweeper (49 servers)

Version Number of Servers Percent
4.3.20.01530.61%
4.3.14.0714.29%
4.3.17.0714.29%
4.3.1.0510.20%
4.2.10.048.16%
4.3.6.036.12%
4.3.19.024.08%
4.3.10.024.08%
4.2.1.012.04%
4.3.12.012.04%
4.1.5.012.04%
4.2.5.012.04%
Other00.00%

OpenVMS (25 servers)

Version Number of Servers Percent
8.31560.00%
7.3520.00%
8.228.00%
7.228.00%
6.114.00%
Other00.00%




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