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You are viewing an outdated report. The latest version of this report was published on August 1st, 2022


    
Mail (MX) Server Survey
January 1st, 2022

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 Queried939,972   100.0%
Number of Servers that didn't respond147,93615.74%
    Server didn't open socket145,32815.46%
    Server didn't provide banner2,6080.28%
Server provided banner792,03684.26%
Server banner identifies software in use515,23154.81%

As indicated by the above table, of the 939,972 servers queried, only 515,231 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
Exim303,73058.95%
Postfix175,60034.08%
Sendmail18,4613.58%
MailEnable10,2541.99%
MDaemon2,6620.52%
Microsoft1,3220.26%
CommuniGate Pro6510.13%
IMail4790.09%
Qmail Toaster4350.08%
XMail3720.07%
OpenSMTPD3110.06%
SurgeSMTP2680.05%
Lotus Domino1420.03%
MagicMail1160.02%
WinWebMail1120.02%
Kerio730.01%
Merak730.01%
Post.Office630.01%
ArGoSoft330.01%
GroupWise300.01%
Gordano Messaging Suite (GMS)160.00%
Trend Micro80.00%
OpenVMS70.00%
VisNetic40.00%
ModusMail20.00%
Interscan10.00%
Mercury10.00%
Neon Mail Server10.00%
WebSTAR10.00%
Mirapoint10.00%
WebSTAR V10.00%
InterScan VirusWall10.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (303,730 servers)

Version Number of Servers Percent
4.94.2232,32976.49%
4.9322,5417.42%
4.958,9012.93%
4.946,4292.12%
4.925,8181.92%
4.914,3221.42%
4.92.33,3541.10%
4.893,2881.08%
Other16,7485.51%

Postfix (175,600 servers)

Version Number of Servers Percent
Other175,600100.00%

Sendmail (18,461 servers)

Version Number of Servers Percent
8.15.29,94753.88%
8.14.42,30112.46%
8.14.71,95410.58%
8.13.81,0855.88%
8.14.59395.09%
8.16.15072.75%
8.14.93591.94%
8.13.13041.65%
8.14.32031.10%
Other8624.67%

MailEnable (10,254 servers)

Version Number of Servers Percent
10.34--3,90138.04%
10.27--7557.36%
10.25--5575.43%
9.00--2722.65%
10.37--2322.26%
10.31--1781.74%
10.31-10.31-1641.60%
10.37--10.371621.58%
10.37-10.37-1461.42%
9.16--1151.12%
10.29--1121.09%
9.00--9.001051.02%
Other3,55534.67%

MDaemon (2,662 servers)

Version Number of Servers Percent
21.5.029511.08%
21.0.31927.21%
13.5.11796.72%
13.0.51074.02%
13.0.41013.79%
11.0.0943.53%
11.0.3893.34%
21.0.2873.27%
19.5.5863.23%
19.5.4803.01%
16.5.2752.82%
21.0.1682.55%
14.5.2552.07%
12.5.6521.95%
20.0.4431.62%
10.0.0311.16%
12.5.4291.09%
10.1.2271.01%
16.0.4271.01%
Other94535.50%

Microsoft (1,322 servers)

Version Number of Servers Percent
6.0.3790.467541631.47%
8.5.9600.1638421716.41%
10.0.14393.416913410.14%
7.5.7601.175141158.70%
10.0.17763.1697896.73%
6.0.3790.3959725.45%
5.0.2195.5329574.31%
8.0.9200.16384392.95%
5.0.2195.6713241.82%
10.0.14393.2608211.59%
7.0.6002.18264191.44%
6.0.3790.1830161.21%
10.0.17763.1161.21%
10.0.14393.0141.06%
Other735.52%

CommuniGate Pro (651 servers)

Version Number of Servers Percent
6.2.158613.21%
6.2.146710.29%
6.1.20284.30%
6.2.12233.53%
6.1.16192.92%
5.4.11172.61%
5.2.20152.30%
6.3.6152.30%
6.1.18132.00%
6.0.11132.00%
6.0.9121.84%
6.3.5111.69%
6.2.16111.69%
5.1.16101.54%
6.3.891.38%
6.3.391.38%
6.2.781.23%
6.3.781.23%
7.1.181.23%
6.2.1081.23%
6.1.1071.08%
6.3.971.08%
5.2.1971.08%
6.1.1971.08%
Other23335.79%

IMail (479 servers)

Version Number of Servers Percent
12.5.8.419519.83%
12.5.7.595711.90%
12.5.6.101469.60%
12.4.1.15306.26%
9.23265.43%
12.5.6.105214.38%
8.22214.38%
12.5.3.93193.97%
12.3.0.100183.76%
8.15173.55%
8.05173.55%
10.02132.71%
12.5.5.115122.51%
12.5.5.117102.09%
12.5.4.14691.88%
11.571.46%
Other6112.73%

Qmail Toaster (435 servers)

Version Number of Servers Percent
1.332374.25%
1.0310323.68%
1.03.561.38%
Other30.69%

XMail (372 servers)

Version Number of Servers Percent
1.2720154.03%
1.2211129.84%
1.26174.57%
1.25174.57%
1.2492.42%
1.1551.34%
Other123.23%

OpenSMTPD (311 servers)

Version Number of Servers Percent
Other311100.00%

SurgeSMTP (268 servers)

Version Number of Servers Percent
7.3o4-43814.18%
7.5c-13011.19%
7.6h-2238.58%
7.5a-1217.84%
7.3e2-2176.34%
7.4o-1155.60%
7.6d-1134.85%
7.1e-1124.48%
7.4e-172.61%
6.5a2-272.61%
7.3i2-251.87%
3.9e-141.49%
7.2a-141.49%
7.2i-141.49%
7.6h-141.49%
6.9c-141.49%
6.7c-141.49%
6.5a-131.12%
7.4m-131.12%
Other5018.66%

Lotus Domino (142 servers)

Version Number of Servers Percent
8.5.32920.42%
8.5.3FP62316.20%
7.074.93%
8.5.174.93%
8.5.2FP274.93%
7.0.264.23%
7.0.364.23%
8.5.242.82%
8.5.3FP142.82%
8.5.3FP532.11%
5.0.832.11%
8.0.132.11%
7.5.121.41%
8.5.2FP321.41%
7.0.3FP121.41%
6.521.41%
8.5.2FP421.41%
8.5.1FP521.41%
5.0.1321.41%
8.5.3FP321.41%
6.5.121.41%
8.5.3FP421.41%
8.5.2FP121.41%
Other1812.68%

MagicMail (116 servers)

Version Number of Servers Percent
Other116100.00%

WinWebMail (112 servers)

Version Number of Servers Percent
4.2.0.12118.75%
3.9.0.71916.96%
4.4.0.11311.61%
3.8.1.3108.93%
4.3.0.176.25%
3.8.0.143.57%
3.8.1.543.57%
4.1.0.143.57%
3.7.6.143.57%
3.8.6.143.57%
1.032.68%
3.7.3.132.68%
4.0.0.132.68%
3.8.5.132.68%
3.9.0.121.79%
3.7.5.121.79%
Other65.36%

Kerio (73 servers)

Version Number of Servers Percent
6.7.31824.66%
6.6.21013.70%
6.7.0810.96%
6.6.179.59%
6.5.056.85%
6.5.256.85%
6.7.245.48%
6.7.145.48%
5.7.922.74%
6.3.022.74%
6.4.122.74%
6.5.122.74%
6.0.1011.37%
6.4.011.37%
6.0.811.37%
6.6.011.37%
Other00.00%

Merak (73 servers)

Version Number of Servers Percent
8.0.31926.03%
8.9.11824.66%
7.6.179.59%
8.3.845.48%
7.4.534.11%
9.0.334.11%
8.5.034.11%
7.6.022.74%
6.1.011.37%
8.3.611.37%
8.9.211.37%
8.0.111.37%
7.5.211.37%
4.2.111.37%
5.8.211.37%
8.9.711.37%
7.6.411.37%
7.4.411.37%
6.0.811.37%
7.0.111.37%
8.9.011.37%
6.0.311.37%
Other00.00%

Post.Office (63 servers)

Version Number of Servers Percent
4.42031.75%
4.31219.05%
4.2.21015.87%
3.5.369.52%
4.1.2.446.35%
4.223.17%
4.2.1.123.17%
3.9.211.59%
4.1.111.59%
3.5.3J11.59%
4.0.111.59%
4.1.0.311.59%
4.111.59%
3.1.211.59%
Other00.00%

ArGoSoft (33 servers)

Version Number of Servers Percent
1.8 (1.8.9.6)1030.30%
1.8 (1.8.9.5)515.15%
1.8 (1.8.9.3)412.12%
1.8 (1.8.8.8)26.06%
1.8 (1.8.7.3)26.06%
1.8 (1.8.8.7)26.06%
1.8 (1.8.9.2)26.06%
1.8 (1.8.9.1)26.06%
1.8 (1.8.8.9)13.03%
1.8 (1.8.8.4)13.03%
1.8 (1.8.2.1)13.03%
1.8 (1.8.2.5)13.03%
Other00.00%

GroupWise (30 servers)

Version Number of Servers Percent
18.3.1723.33%
18.1.1413.33%
18.2.1310.00%
18.2.026.67%
14.0.026.67%
14.2.126.67%
18.0.013.33%
14.2.313.33%
6.5.013.33%
6.5.713.33%
8.0.313.33%
7.0.113.33%
14.2.013.33%
18.0.213.33%
14.2.213.33%
7.0.213.33%
Other00.00%

Gordano Messaging Suite (GMS) (16 servers)

Version Number of Servers Percent
Other16100.00%

Trend Micro (8 servers)

Version Number of Servers Percent
5.18450.00%
5.7112.50%
7.5ready112.50%
5.5112.50%
7.1112.50%
Other00.00%

OpenVMS (7 servers)

Version Number of Servers Percent
8.4571.43%
7.3228.57%
Other00.00%

VisNetic (4 servers)

Version Number of Servers Percent
9.3.2.0375.00%
8.0.3125.00%
Other00.00%

ModusMail (2 servers)

Version Number of Servers Percent
4.1.361.212100.00%
Other00.00%

Interscan (1 servers)

Version Number of Servers Percent
3.8-Build_30131100.00%
Other00.00%

Mercury (1 servers)

Version Number of Servers Percent
1.481100.00%
Other00.00%

Neon Mail Server (1 servers)

Version Number of Servers Percent
3.1.21100.00%
Other00.00%

WebSTAR (1 servers)

Version Number of Servers Percent
Other1100.00%

Mirapoint (1 servers)

Version Number of Servers Percent
4.4.5-GA1100.00%
Other00.00%

WebSTAR V (1 servers)

Version Number of Servers Percent
5.3.21100.00%
Other00.00%

InterScan VirusWall (1 servers)

Version Number of Servers Percent
Other1100.00%



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