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You are viewing an outdated report.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


    
Mail (MX) Server Survey
June 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 Queried834,663   100.0%
Number of Servers that didn't respond149,69417.93%
    Server didn't open socket147,85717.71%
    Server didn't provide banner1,8370.22%
Server provided banner684,96982.07%
Server banner identifies software in use465,18855.73%

As indicated by the above table, of the 834,663 servers queried, only 465,188 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
Exim274,61959.03%
Postfix160,35434.47%
Sendmail16,1033.46%
MailEnable8,6731.86%
MDaemon1,9700.42%
Microsoft9650.21%
CommuniGate Pro5760.12%
IMail3440.07%
XMail3230.07%
OpenSMTPD3040.07%
SurgeSMTP2380.05%
Qmail Toaster1740.04%
MagicMail1200.03%
Lotus Domino910.02%
WinWebMail870.02%
Merak550.01%
Kerio520.01%
Post.Office510.01%
ArGoSoft340.01%
GroupWise250.01%
Gordano Messaging Suite (GMS)110.00%
OpenVMS60.00%
Trend Micro40.00%
VisNetic40.00%
ModusMail20.00%
Mercury10.00%
Mirapoint10.00%
InterScan VirusWall10.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (274,619 servers)

Version Number of Servers Percent
4.96150,99054.98%
4.9578,87528.72%
4.94.212,3294.49%
4.939,9993.64%
4.923,8261.39%
Other18,6006.77%

Postfix (160,354 servers)

Version Number of Servers Percent
Other160,354100.00%

Sendmail (16,103 servers)

Version Number of Servers Percent
8.16.15,31232.99%
8.15.24,66328.96%
8.14.71,84811.48%
8.14.41,5749.77%
8.13.87374.58%
8.14.54392.73%
8.17.13612.24%
8.14.92371.47%
8.13.12171.35%
Other7154.44%

MailEnable (8,673 servers)

Version Number of Servers Percent
10.43--3,45439.82%
10.34--5986.89%
10.27--3544.08%
10.42--3053.52%
10.25--2783.21%
10.43-10.43-1972.27%
10.45--1731.99%
9.00--1471.69%
10.45--10.451431.65%
10.43--10.431281.48%
9.00--9.00981.13%
10.45-10.45-961.11%
10.31--961.11%
Other2,60630.05%

MDaemon (1,970 servers)

Version Number of Servers Percent
23.0.127714.06%
13.5.11055.33%
22.0.3934.72%
23.0.0934.72%
13.0.5773.91%
11.0.0703.55%
13.0.4693.50%
21.5.2693.50%
11.0.3683.45%
19.5.4542.74%
16.5.2442.23%
14.5.2422.13%
21.5.3412.08%
12.5.6341.73%
19.5.5291.47%
10.0.0231.17%
21.0.3221.12%
12.5.4221.12%
22.0.2201.02%
Other71836.45%

Microsoft (965 servers)

Version Number of Servers Percent
6.0.3790.467526227.15%
8.5.9600.1638413413.89%
10.0.17763.169712813.26%
10.0.14393.416912713.16%
7.5.7601.17514646.63%
6.0.3790.3959505.18%
5.0.2195.5329454.66%
8.0.9200.16384212.18%
5.0.2195.6713191.97%
7.0.6002.18264151.55%
10.0.17763.1121.24%
10.0.14393.0101.04%
Other788.08%

CommuniGate Pro (576 servers)

Version Number of Servers Percent
6.2.15559.55%
6.2.14498.51%
6.3.17396.77%
6.3.18345.90%
6.1.20233.99%
5.4.11132.26%
6.0.9132.26%
6.3.14122.08%
6.1.16122.08%
6.0.11111.91%
6.1.18111.91%
6.3.15101.74%
5.2.20101.74%
6.3.1691.56%
6.3.691.56%
7.1.481.39%
6.2.1271.22%
5.1.1671.22%
6.3.561.04%
6.3.1361.04%
Other23240.28%

IMail (344 servers)

Version Number of Servers Percent
12.5.8.413510.17%
12.5.6.101339.59%
12.5.7.59308.72%
9.23246.98%
12.6.0.17246.98%
12.5.8.58205.81%
12.5.8.59195.52%
8.05164.65%
12.5.3.93154.36%
12.5.6.105144.07%
8.22133.78%
12.4.1.15133.78%
12.5.8.54123.49%
12.3.0.10092.62%
8.1582.33%
12.5.4.14661.74%
12.6.0.1961.74%
12.5.5.11551.45%
12.5.5.11741.16%
11.541.16%
Other349.88%

XMail (323 servers)

Version Number of Servers Percent
1.2719560.37%
1.228225.39%
1.25134.02%
1.26123.72%
1.2472.17%
1.1561.86%
Other82.48%

OpenSMTPD (304 servers)

Version Number of Servers Percent
Other304100.00%

SurgeSMTP (238 servers)

Version Number of Servers Percent
7.7c-13815.97%
7.3o4-4218.82%
7.6j-1208.40%
7.6u-1208.40%
7.5c-1145.88%
7.3e2-2145.88%
7.1e-183.36%
7.6h-283.36%
7.5a-172.94%
6.9c-172.94%
7.6d-172.94%
7.4o-162.52%
7.6s-152.10%
7.4e-152.10%
6.5a2-241.68%
6.7c-141.68%
7.3i2-231.26%
7.6q-131.26%
3.9e-131.26%
7.2i-131.26%
Other3815.97%

Qmail Toaster (174 servers)

Version Number of Servers Percent
1.039152.30%
1.37442.53%
1.03.563.45%
1.03.621.15%
Other10.57%

MagicMail (120 servers)

Version Number of Servers Percent
Other120100.00%

Lotus Domino (91 servers)

Version Number of Servers Percent
8.5.31920.88%
8.5.3FP61617.58%
7.055.49%
7.0.355.49%
6.533.30%
8.5.2FP233.30%
8.5.133.30%
7.0.233.30%
8.5.3FP522.20%
8.5.2FP122.20%
8.5.3FP122.20%
8.022.20%
6.5.122.20%
8.5.2FP422.20%
8.5.1FP522.20%
8.5.222.20%
8.5.3FP422.20%
8.5.2FP322.20%
8.0.122.20%
6.5.322.20%
8.5.3FP6HF121511.10%
6.5.411.10%
6.0.111.10%
5.0.811.10%
7.5.111.10%
7.0.4FP111.10%
5.0.1111.10%
6.5.211.10%
7.0.3FP111.10%
7.0.4FP211.10%
Other00.00%

WinWebMail (87 servers)

Version Number of Servers Percent
4.4.0.11719.54%
4.2.0.11517.24%
3.9.0.71314.94%
4.3.0.178.05%
3.8.1.366.90%
3.7.3.144.60%
3.8.6.144.60%
4.1.0.133.45%
3.8.0.133.45%
3.7.7.322.30%
3.8.1.522.30%
3.8.3.111.15%
1.011.15%
3.7.6.111.15%
3.9.3.111.15%
4.5.0.111.15%
3.8.5.111.15%
3.9.2.111.15%
3.9.0.111.15%
3.8.1.611.15%
4.0.0.111.15%
3.7.5.111.15%
Other00.00%

Merak (55 servers)

Version Number of Servers Percent
8.0.31527.27%
8.9.11425.45%
7.6.1712.73%
8.3.859.09%
7.4.523.64%
8.0.111.82%
8.9.211.82%
8.3.611.82%
6.1.011.82%
9.0.311.82%
8.5.011.82%
4.2.111.82%
7.6.011.82%
7.4.411.82%
6.0.811.82%
7.0.111.82%
5.8.211.82%
Other00.00%

Kerio (52 servers)

Version Number of Servers Percent
6.7.31019.23%
6.6.1815.38%
6.7.0611.54%
6.6.2611.54%
6.7.159.62%
6.5.259.62%
5.7.923.85%
6.4.123.85%
6.7.223.85%
6.5.123.85%
6.0.1011.92%
6.3.111.92%
6.0.811.92%
6.5.011.92%
Other00.00%

Post.Office (51 servers)

Version Number of Servers Percent
4.42141.18%
4.2.21019.61%
4.3815.69%
3.5.335.88%
3.9.223.92%
4.223.92%
4.1.2.423.92%
4.111.96%
3.1.211.96%
4.2.1.111.96%
Other00.00%

ArGoSoft (34 servers)

Version Number of Servers Percent
1.8 (1.8.9.6)1441.18%
1.8 (1.8.9.3)411.76%
1.8 (1.8.9.5)38.82%
1.8 (1.8.8.8)25.88%
1.8 (1.8.7.3)25.88%
1.8 (1.8.8.7)25.88%
1.8 (1.8.9.2)25.88%
1.8 (1.8.8.9)12.94%
1.8 (1.8.8.4)12.94%
1.8 (1.8.6.0)12.94%
1.8 (1.8.9.1)12.94%
1.8 (1.8.9.4)12.94%
Other00.00%

GroupWise (25 servers)

Version Number of Servers Percent
18.4.2416.00%
18.3.1416.00%
18.2.1312.00%
18.1.128.00%
14.2.228.00%
6.5.714.00%
14.2.114.00%
14.2.314.00%
18.0.014.00%
6.5.014.00%
18.4.114.00%
8.0.314.00%
14.0.014.00%
18.0.214.00%
18.4.014.00%
Other00.00%

Gordano Messaging Suite (GMS) (11 servers)

Version Number of Servers Percent
Other11100.00%

OpenVMS (6 servers)

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

Trend Micro (4 servers)

Version Number of Servers Percent
5.18375.00%
5.7125.00%
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%

Mercury (1 servers)

Version Number of Servers Percent
1.481100.00%
Other00.00%

Mirapoint (1 servers)

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

InterScan VirusWall (1 servers)

Version Number of Servers Percent
Other1100.00%




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