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You are viewing an outdated report. The latest version of this report was published on June 1st, 2023


    
Mail (MX) Server Survey
May 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 Queried656,938   100.0%
Number of Servers that didn't respond95,86514.59%
    Server didn't open socket94,53214.39%
    Server didn't provide banner1,3330.20%
Server provided banner561,07385.41%
Server banner identifies software in use380,74457.96%

As indicated by the above table, of the 656,938 servers queried, only 380,744 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
Exim230,40360.51%
Postfix125,69433.01%
Sendmail13,4673.54%
MailEnable7,1471.88%
MDaemon1,4820.39%
Microsoft6860.18%
CommuniGate Pro4050.11%
IMail2650.07%
XMail2500.07%
OpenSMTPD2090.05%
SurgeSMTP1920.05%
Qmail Toaster1400.04%
MagicMail920.02%
Lotus Domino670.02%
WinWebMail590.02%
Merak460.01%
Kerio410.01%
Post.Office340.01%
ArGoSoft230.01%
GroupWise190.00%
Gordano Messaging Suite (GMS)60.00%
Trend Micro40.00%
OpenVMS40.00%
VisNetic40.00%
ModusMail20.00%
Mercury10.00%
WebSTAR10.00%
Mirapoint10.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (230,403 servers)

Version Number of Servers Percent
4.96124,52954.05%
4.9568,92429.91%
4.94.210,4914.55%
4.938,0873.51%
4.923,0921.34%
Other15,2806.63%

Postfix (125,694 servers)

Version Number of Servers Percent
Other125,694100.00%

Sendmail (13,467 servers)

Version Number of Servers Percent
8.15.24,45633.09%
8.16.14,26331.66%
8.14.71,41810.53%
8.14.41,2399.20%
8.13.85784.29%
8.14.53092.29%
8.17.12601.93%
8.14.92041.51%
8.13.11711.27%
Other5694.23%

MailEnable (7,147 servers)

Version Number of Servers Percent
10.43--2,26331.66%
10.42--86712.13%
10.34--5187.25%
10.27--2853.99%
10.25--2453.43%
10.43-10.43-1652.31%
10.45--1331.86%
9.00--1211.69%
10.43--10.431201.68%
10.45--10.451061.48%
9.00--9.00891.25%
Other2,23531.27%

MDaemon (1,482 servers)

Version Number of Servers Percent
23.0.020914.10%
22.0.31067.15%
21.5.2916.14%
13.5.1835.60%
13.0.5614.12%
11.0.3553.71%
11.0.0543.64%
13.0.4503.37%
19.5.4372.50%
16.5.2352.36%
12.5.6322.16%
14.5.2312.09%
19.5.5271.82%
22.0.2241.62%
10.0.0181.21%
21.0.3161.08%
Other55337.31%

Microsoft (686 servers)

Version Number of Servers Percent
6.0.3790.467518827.41%
8.5.9600.1638410014.58%
10.0.14393.41699113.27%
10.0.17763.16978912.97%
7.5.7601.17514507.29%
6.0.3790.3959385.54%
5.0.2195.5329284.08%
5.0.2195.6713162.33%
8.0.9200.16384131.90%
10.0.17763.1121.75%
10.0.14393.071.02%
Other547.87%

CommuniGate Pro (405 servers)

Version Number of Servers Percent
6.2.15389.38%
6.2.14338.15%
6.3.17297.16%
6.1.20174.20%
6.3.18143.46%
6.3.14112.72%
6.0.9102.47%
5.2.2092.22%
6.1.1892.22%
6.3.681.98%
6.1.1681.98%
5.4.1171.73%
6.0.1171.73%
5.1.1671.73%
6.3.1661.48%
6.3.1361.48%
6.2.1261.48%
7.1.461.48%
5.1.751.23%
6.3.551.23%
6.3.1551.23%
Other15939.26%

IMail (265 servers)

Version Number of Servers Percent
12.5.7.592810.57%
12.5.8.41238.68%
12.5.6.101217.92%
9.23186.79%
12.6.0.17166.04%
12.5.8.59155.66%
12.5.8.58155.66%
12.5.6.105114.15%
8.22114.15%
8.05103.77%
12.5.3.93103.77%
12.5.8.5493.40%
12.4.1.1583.02%
12.3.0.10083.02%
8.1583.02%
12.5.5.11562.26%
12.5.4.14662.26%
11.541.51%
12.5.5.11741.51%
12.6.0.1931.13%
10.0231.13%
6.0431.13%
5.0531.13%
Other228.30%

XMail (250 servers)

Version Number of Servers Percent
1.2714758.80%
1.226526.00%
1.25124.80%
1.26114.40%
1.2452.00%
1.1531.20%
Other72.80%

OpenSMTPD (209 servers)

Version Number of Servers Percent
Other209100.00%

SurgeSMTP (192 servers)

Version Number of Servers Percent
7.7c-13015.62%
7.6u-1199.90%
7.6j-1157.81%
7.3o4-4147.29%
7.5c-1136.77%
7.3e2-2115.73%
7.5a-184.17%
7.1e-173.65%
6.9c-163.12%
7.6h-263.12%
7.6s-152.60%
6.5a2-242.08%
7.4e-142.08%
7.6d-142.08%
7.4o-131.56%
7.7d-931.56%
7.3i2-231.56%
3.9e-131.56%
7.6q-121.04%
6.5a-121.04%
6.8g-121.04%
7.3c3-321.04%
7.7b-321.04%
7.1f-1521.04%
6.7c-121.04%
7.3n-121.04%
Other189.38%

Qmail Toaster (140 servers)

Version Number of Servers Percent
1.037251.43%
1.36042.86%
1.03.553.57%
1.03.621.43%
Other10.71%

MagicMail (92 servers)

Version Number of Servers Percent
Other92100.00%

Lotus Domino (67 servers)

Version Number of Servers Percent
8.5.3FP61420.90%
8.5.31217.91%
7.057.46%
8.5.134.48%
8.5.2FP234.48%
7.0.334.48%
8.022.99%
6.5.322.99%
8.5.3FP122.99%
8.5.1FP522.99%
7.0.222.99%
8.5.2FP122.99%
7.0.3FP111.49%
6.5.211.49%
7.0.4FP211.49%
5.0.1111.49%
7.0.4FP111.49%
8.5.3FP411.49%
5.0.811.49%
8.0.111.49%
8.5.2FP311.49%
8.5.3FP311.49%
8.5.211.49%
6.0.111.49%
6.5.411.49%
8.5.3FP511.49%
6.511.49%
Other00.00%

WinWebMail (59 servers)

Version Number of Servers Percent
4.4.0.11220.34%
4.2.0.11016.95%
3.9.0.7813.56%
4.3.0.158.47%
3.8.6.146.78%
3.7.3.135.08%
3.8.0.135.08%
3.8.1.335.08%
3.8.1.523.39%
3.8.3.111.69%
1.011.69%
3.7.6.111.69%
4.1.0.111.69%
3.9.3.111.69%
3.9.2.111.69%
3.9.0.111.69%
3.8.1.611.69%
4.0.0.111.69%
Other00.00%

Merak (46 servers)

Version Number of Servers Percent
8.0.31328.26%
8.9.11226.09%
7.6.1715.22%
8.3.836.52%
7.4.524.35%
8.0.112.17%
8.9.212.17%
8.3.612.17%
6.1.012.17%
8.5.012.17%
4.2.112.17%
7.6.012.17%
6.0.812.17%
5.8.212.17%
Other00.00%

Kerio (41 servers)

Version Number of Servers Percent
6.7.3819.51%
6.6.1614.63%
6.7.1512.20%
6.7.0512.20%
6.5.249.76%
6.6.249.76%
5.7.924.88%
6.7.224.88%
6.5.124.88%
6.0.1012.44%
6.3.112.44%
6.0.812.44%
Other00.00%

Post.Office (34 servers)

Version Number of Servers Percent
4.41338.24%
4.2.2720.59%
4.3617.65%
4.225.88%
3.5.325.88%
4.1.2.412.94%
3.9.212.94%
4.112.94%
3.1.212.94%
Other00.00%

ArGoSoft (23 servers)

Version Number of Servers Percent
1.8 (1.8.9.6)730.43%
1.8 (1.8.9.3)417.39%
1.8 (1.8.8.8)28.70%
1.8 (1.8.8.7)28.70%
1.8 (1.8.9.2)28.70%
1.8 (1.8.8.9)14.35%
1.8 (1.8.7.3)14.35%
1.8 (1.8.8.4)14.35%
1.8 (1.8.9.1)14.35%
1.8 (1.8.9.4)14.35%
1.8 (1.8.9.5)14.35%
Other00.00%

GroupWise (19 servers)

Version Number of Servers Percent
18.4.2315.79%
18.3.1315.79%
18.2.1210.53%
14.2.2210.53%
6.5.715.26%
14.2.115.26%
14.2.315.26%
18.0.015.26%
18.1.115.26%
8.0.315.26%
14.0.015.26%
18.2.015.26%
18.0.215.26%
Other00.00%

Gordano Messaging Suite (GMS) (6 servers)

Version Number of Servers Percent
Other6100.00%

Trend Micro (4 servers)

Version Number of Servers Percent
5.18375.00%
5.7125.00%
Other00.00%

OpenVMS (4 servers)

Version Number of Servers Percent
7.3250.00%
8.4125.00%
8.2125.00%
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%

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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