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You are viewing an outdated report. The latest version of this report was published on May 1st, 2024


    
Mail (MX) Server Survey
January 1st, 2023

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 Queried833,473   100.0%
Number of Servers that didn't respond132,05415.84%
    Server didn't open socket128,12915.37%
    Server didn't provide banner3,9250.47%
Server provided banner701,41984.16%
Server banner identifies software in use464,97055.79%

As indicated by the above table, of the 833,473 servers queried, only 464,970 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
Exim279,41460.09%
Postfix155,27033.39%
Sendmail16,0493.45%
MailEnable8,8551.90%
MDaemon1,9730.42%
Microsoft9460.20%
CommuniGate Pro5580.12%
IMail3620.08%
XMail3210.07%
OpenSMTPD2820.06%
SurgeSMTP2390.05%
Qmail Toaster1760.04%
MagicMail1070.02%
Lotus Domino920.02%
WinWebMail820.02%
Merak570.01%
Kerio510.01%
Post.Office460.01%
ArGoSoft310.01%
GroupWise260.01%
Gordano Messaging Suite (GMS)100.00%
OpenVMS60.00%
Trend Micro50.00%
VisNetic40.00%
ModusMail20.00%
Neon Mail Server20.00%
Interscan10.00%
Mercury10.00%
WebSTAR10.00%
Mirapoint10.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (279,414 servers)

Version Number of Servers Percent
4.95206,23573.81%
4.9620,7167.41%
4.94.215,8035.66%
4.9311,2204.02%
4.924,1351.48%
4.942,9911.07%
Other18,3146.55%

Postfix (155,270 servers)

Version Number of Servers Percent
Other155,270100.00%

Sendmail (16,049 servers)

Version Number of Servers Percent
8.15.26,08637.92%
8.16.13,80023.68%
8.14.71,84011.46%
8.14.41,63810.21%
8.13.88035.00%
8.14.54342.70%
8.14.92481.55%
8.17.12461.53%
8.13.12351.46%
Other7194.48%

MailEnable (8,855 servers)

Version Number of Servers Percent
10.42--2,26025.52%
10.34--1,77920.09%
10.27--4144.68%
10.25--3413.85%
9.00--1922.17%
10.43--10.431561.76%
10.43--1551.75%
10.43-10.43-1361.54%
10.37--1301.47%
10.31--1151.30%
10.31-10.31-1031.16%
9.00--9.00951.07%
10.39--901.02%
Other2,88932.63%

MDaemon (1,973 servers)

Version Number of Servers Percent
22.0.325112.72%
21.5.21326.69%
13.5.11226.18%
13.0.5804.05%
22.0.2743.75%
11.0.0693.50%
11.0.3673.40%
13.0.4643.24%
14.5.2482.43%
16.5.2472.38%
19.5.4452.28%
19.5.5412.08%
12.5.6381.93%
21.0.3371.88%
22.0.0261.32%
21.0.1251.27%
21.5.1251.27%
12.5.4231.17%
21.5.0231.17%
10.0.0221.12%
9.6.6221.12%
Other69235.07%

Microsoft (946 servers)

Version Number of Servers Percent
6.0.3790.467528329.92%
8.5.9600.1638413714.48%
10.0.14393.416911612.26%
10.0.17763.16979910.47%
7.5.7601.17514747.82%
5.0.2195.5329485.07%
6.0.3790.3959464.86%
8.0.9200.16384232.43%
5.0.2195.6713192.01%
7.0.6002.18264131.37%
10.0.14393.0111.16%
10.0.17763.1111.16%
Other666.98%

CommuniGate Pro (558 servers)

Version Number of Servers Percent
6.2.145810.39%
6.2.155610.04%
6.3.16193.41%
6.1.20193.41%
6.3.14173.05%
6.0.11142.51%
6.1.16142.51%
6.3.15132.33%
6.1.18122.15%
6.0.9122.15%
5.2.20122.15%
5.4.11101.79%
5.1.16101.79%
6.3.13101.79%
7.1.171.25%
6.2.1271.25%
6.2.1671.25%
6.3.661.08%
6.3.561.08%
6.1.1961.08%
Other24343.55%

IMail (362 servers)

Version Number of Servers Percent
12.5.8.414712.98%
12.5.6.101359.67%
12.5.7.59318.56%
9.23267.18%
12.6.0.17195.25%
12.5.8.58195.25%
8.05164.42%
12.5.8.59164.42%
12.4.1.15154.14%
12.5.3.93143.87%
12.5.6.105143.87%
8.22123.31%
8.15102.76%
12.3.0.100102.76%
12.5.8.5482.21%
10.0271.93%
12.5.4.14661.66%
12.5.5.11551.38%
12.5.5.11751.38%
11.541.10%
Other4311.88%

XMail (321 servers)

Version Number of Servers Percent
1.2718958.88%
1.228325.86%
1.26144.36%
1.25144.36%
1.2492.80%
1.1561.87%
Other61.87%

OpenSMTPD (282 servers)

Version Number of Servers Percent
Other282100.00%

SurgeSMTP (239 servers)

Version Number of Servers Percent
7.6j-13615.06%
7.3o4-4218.79%
7.6u-1197.95%
7.5c-1166.69%
7.3e2-2156.28%
7.6s-1156.28%
7.5a-1114.60%
7.6h-293.77%
7.4o-183.35%
7.1e-172.93%
7.6d-172.93%
6.5a2-272.93%
6.7c-162.51%
7.4e-162.51%
7.6m-152.09%
7.3i2-241.67%
3.9e-131.26%
Other4418.41%

Qmail Toaster (176 servers)

Version Number of Servers Percent
1.038648.86%
1.38347.16%
1.03.552.84%
Other21.14%

MagicMail (107 servers)

Version Number of Servers Percent
Other107100.00%

Lotus Domino (92 servers)

Version Number of Servers Percent
8.5.31920.65%
8.5.3FP61516.30%
7.055.43%
7.0.344.35%
8.5.2FP244.35%
8.5.144.35%
7.0.244.35%
6.522.17%
8.5.2FP122.17%
8.5.3FP122.17%
8.5.3FP422.17%
8.022.17%
6.5.122.17%
8.5.2FP322.17%
6.5.322.17%
7.0.4FP222.17%
7.0.3FP122.17%
8.5.3FP211.09%
8.5.3FP6HF121511.09%
6.5.411.09%
6.0.111.09%
8.5.3FP511.09%
8.5.1FP511.09%
5.0.13a11.09%
8.5.2FP411.09%
8.5.211.09%
5.0.811.09%
8.0.111.09%
7.0.4FP111.09%
5.0.1111.09%
8.5.1FP311.09%
6.5.211.09%
6.5.4FP211.09%
8.5.3FP311.09%
Other00.00%

WinWebMail (82 servers)

Version Number of Servers Percent
4.4.0.11619.51%
3.9.0.71417.07%
4.2.0.11214.63%
4.3.0.167.32%
3.8.6.156.10%
3.7.3.144.88%
3.8.0.144.88%
4.1.0.133.66%
3.8.1.333.66%
1.022.44%
3.8.5.122.44%
4.0.0.122.44%
3.8.3.111.22%
3.7.6.111.22%
3.9.3.111.22%
3.9.2.111.22%
3.7.7.311.22%
3.8.1.511.22%
3.8.1.611.22%
3.9.2.211.22%
3.7.5.111.22%
Other00.00%

Merak (57 servers)

Version Number of Servers Percent
8.9.11526.32%
8.0.31526.32%
7.6.1712.28%
8.3.847.02%
7.4.535.26%
8.0.111.75%
8.9.211.75%
6.1.011.75%
8.5.011.75%
9.0.311.75%
4.2.111.75%
8.9.711.75%
7.6.011.75%
7.4.411.75%
6.0.811.75%
7.0.111.75%
8.9.011.75%
5.8.211.75%
Other00.00%

Kerio (51 servers)

Version Number of Servers Percent
6.7.31121.57%
6.6.1713.73%
6.6.2611.76%
6.7.159.80%
6.7.059.80%
6.5.259.80%
5.7.923.92%
6.3.023.92%
6.7.223.92%
6.5.123.92%
6.0.1011.96%
6.3.111.96%
6.0.811.96%
6.5.011.96%
Other00.00%

Post.Office (46 servers)

Version Number of Servers Percent
4.41430.43%
4.31021.74%
4.2.21021.74%
3.9.224.35%
4.224.35%
4.1.2.424.35%
3.5.324.35%
3.5.3J12.17%
4.112.17%
3.1.212.17%
4.2.1.112.17%
Other00.00%

ArGoSoft (31 servers)

Version Number of Servers Percent
1.8 (1.8.9.6)929.03%
1.8 (1.8.9.3)412.90%
1.8 (1.8.9.5)39.68%
1.8 (1.8.8.8)26.45%
1.8 (1.8.7.3)26.45%
1.8 (1.8.8.7)26.45%
1.8 (1.8.9.2)26.45%
1.8 (1.8.9.1)26.45%
1.8 (1.8.8.4)13.23%
1.8 (1.8.1.7)13.23%
1.8 (1.8.6.0)13.23%
1.8 (1.8.9.4)13.23%
1.8 (1.8.2.1)13.23%
Other00.00%

GroupWise (26 servers)

Version Number of Servers Percent
18.3.1519.23%
18.2.1415.38%
18.4.127.69%
14.2.227.69%
18.4.027.69%
6.5.713.85%
14.2.113.85%
14.2.313.85%
18.0.013.85%
18.1.113.85%
6.5.013.85%
14.2.013.85%
8.0.313.85%
14.0.013.85%
18.2.013.85%
18.0.213.85%
Other00.00%

Gordano Messaging Suite (GMS) (10 servers)

Version Number of Servers Percent
Other10100.00%

OpenVMS (6 servers)

Version Number of Servers Percent
8.4350.00%
7.3233.33%
8.2116.67%
Other00.00%

Trend Micro (5 servers)

Version Number of Servers Percent
5.18360.00%
5.7240.00%
Other00.00%

VisNetic (4 servers)

Version Number of Servers Percent
9.3.2.0250.00%
8.0.3125.00%
5.0.1125.00%
Other00.00%

ModusMail (2 servers)

Version Number of Servers Percent
4.1.361.212100.00%
Other00.00%

Neon Mail Server (2 servers)

Version Number of Servers Percent
3.0.7150.00%
3.1.2150.00%
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%

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%




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