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You are viewing an outdated report.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
April 1st, 2024

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 Queried672,561   100.0%
Number of Servers that didn't respond106,12215.78%
    Server didn't open socket104,74715.57%
    Server didn't provide banner1,3750.20%
Server provided banner566,43984.22%
Server banner identifies software in use379,79556.47%

As indicated by the above table, of the 672,561 servers queried, only 379,795 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
Exim225,61959.41%
Postfix130,21134.28%
Sendmail13,1793.47%
MailEnable6,9431.83%
MDaemon1,3730.36%
Microsoft6260.16%
CommuniGate Pro4420.12%
XMail2530.07%
OpenSMTPD2320.06%
IMail2170.06%
SurgeSMTP1920.05%
Qmail Toaster1240.03%
MagicMail980.03%
Lotus Domino670.02%
WinWebMail450.01%
Merak410.01%
Kerio400.01%
Post.Office360.01%
ArGoSoft240.01%
GroupWise150.00%
OpenVMS40.00%
Gordano Messaging Suite (GMS)30.00%
VisNetic30.00%
ModusMail20.00%
Trend Micro20.00%
Mercury10.00%
Mirapoint10.00%
WebSTAR V10.00%
InterScan VirusWall10.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (225,619 servers)

Version Number of Servers Percent
4.96.2165,65773.42%
4.9611,4745.09%
4.97.18,7163.86%
4.957,9893.54%
4.936,2282.76%
4.96.15,5872.48%
4.94.24,7732.12%
4.922,6501.17%
Other12,5455.56%

Postfix (130,211 servers)

Version Number of Servers Percent
Other130,211100.00%

Sendmail (13,179 servers)

Version Number of Servers Percent
8.16.15,10838.76%
8.15.23,65627.74%
8.14.71,2029.12%
8.14.41,0117.67%
8.13.85163.92%
8.14.52942.23%
8.17.12632.00%
8.14.91951.48%
8.13.11631.24%
8.17.21521.15%
Other6194.70%

MailEnable (6,943 servers)

Version Number of Servers Percent
10.46--2,99243.09%
10.34--3454.97%
10.43--2623.77%
10.47--2072.98%
10.27--2062.97%
10.25--1742.51%
10.47--10.471402.02%
10.43-10.43-1211.74%
10.42--1191.71%
10.48--1061.53%
10.47-10.47-1041.50%
9.00--861.24%
9.00--9.00811.17%
10.48--10.48741.07%
Other1,92627.74%

MDaemon (1,373 servers)

Version Number of Servers Percent
23.5.21017.36%
23.5.3997.21%
23.5.1785.68%
13.5.1674.88%
13.0.5543.93%
13.0.4503.64%
11.0.0503.64%
21.5.4453.28%
23.5.0423.06%
11.0.3412.99%
19.5.4382.77%
23.0.2352.55%
16.5.2332.40%
14.5.2302.18%
23.0.1302.18%
12.5.6271.97%
21.5.2261.89%
22.0.3231.68%
19.5.5181.31%
Other48635.40%

Microsoft (626 servers)

Version Number of Servers Percent
6.0.3790.467516326.04%
10.0.17763.169710316.45%
10.0.14393.41697812.46%
8.5.9600.163847211.50%
7.5.7601.17514487.67%
6.0.3790.3959375.91%
5.0.2195.5329274.31%
10.0.20348.1162.56%
8.0.9200.16384132.08%
5.0.2195.6713121.92%
10.0.17763.191.44%
Other487.67%

CommuniGate Pro (442 servers)

Version Number of Servers Percent
6.2.154710.63%
6.2.14368.14%
6.3.17194.30%
6.4.1194.30%
6.3.18173.85%
6.3.20173.85%
6.4.0132.94%
6.1.20132.94%
6.3.19122.71%
6.0.992.04%
6.1.1692.04%
6.3.681.81%
5.4.1171.58%
7.1.671.58%
6.0.1171.58%
5.1.1671.58%
6.1.1871.58%
6.3.1461.36%
5.1.761.36%
5.2.2051.13%
6.3.1551.13%
6.3.1351.13%
6.1.1951.13%
Other15635.29%

XMail (253 servers)

Version Number of Servers Percent
1.2716766.01%
1.225622.13%
1.2693.56%
1.2593.56%
1.1531.19%
Other93.56%

OpenSMTPD (232 servers)

Version Number of Servers Percent
Other232100.00%

IMail (217 servers)

Version Number of Servers Percent
12.6.1.42812.90%
12.5.6.101156.91%
12.5.8.41146.45%
9.23135.99%
12.5.8.59135.99%
12.5.7.59125.53%
12.5.3.93125.53%
12.5.8.58115.07%
12.5.6.105115.07%
8.0583.69%
12.4.1.1583.69%
8.2273.23%
7.0752.30%
12.5.5.11552.30%
12.3.0.10052.30%
8.1552.30%
12.6.0.1752.30%
11.552.30%
12.5.4.14641.84%
12.6.0.2041.84%
8.0041.84%
12.5.8.5431.38%
6.0431.38%
10.0231.38%
12.5.5.11731.38%
Other115.07%

SurgeSMTP (192 servers)

Version Number of Servers Percent
7.8a-1178.85%
7.7c-1168.33%
7.3o4-4168.33%
7.7i-1157.81%
7.3e2-2136.77%
7.6j-1115.73%
7.5c-194.69%
6.9c-173.65%
7.5a-163.12%
7.4o-163.12%
7.1e-163.12%
7.6u-163.12%
6.5a2-263.12%
7.7g-152.60%
7.4e-152.60%
7.6s-142.08%
7.8b-242.08%
6.7c-142.08%
7.7h-331.56%
7.6h-231.56%
7.3i2-221.04%
7.7m-121.04%
7.7b-321.04%
7.3c3-321.04%
7.8b-421.04%
7.7l-321.04%
3.9e-121.04%
6.8g-121.04%
7.6d-121.04%
Other126.25%

Qmail Toaster (124 servers)

Version Number of Servers Percent
1.036854.84%
1.35241.94%
1.03.521.61%
Other21.61%

MagicMail (98 servers)

Version Number of Servers Percent
Other98100.00%

Lotus Domino (67 servers)

Version Number of Servers Percent
8.5.31319.40%
8.5.3FP6913.43%
7.057.46%
6.534.48%
7.0.334.48%
8.5.134.48%
8.5.2FP122.99%
8.522.99%
6.5.122.99%
8.5.2FP222.99%
8.5.3FP322.99%
8.0.122.99%
6.5.322.99%
7.0.222.99%
8.5.3FP211.49%
8.5.3FP6HF121511.49%
6.0.111.49%
5.0.13a11.49%
8.5.211.49%
5.0.811.49%
8.5.3FP511.49%
7.0.4FP111.49%
8.011.49%
7.0.4FP211.49%
6.6.611.49%
6.5.211.49%
7.0.3FP111.49%
5.0.1311.49%
8.5.3FP111.49%
Other00.00%

WinWebMail (45 servers)

Version Number of Servers Percent
4.2.0.1920.00%
4.4.0.1715.56%
4.5.0.1613.33%
3.9.0.7511.11%
4.0.0.136.67%
3.8.1.336.67%
3.8.0.124.44%
3.7.3.124.44%
1.012.22%
3.8.5.112.22%
3.9.3.112.22%
3.8.6.112.22%
3.9.2.112.22%
3.9.0.112.22%
4.3.0.112.22%
4.1.0.112.22%
Other00.00%

Merak (41 servers)

Version Number of Servers Percent
8.9.11024.39%
8.0.3921.95%
7.6.1717.07%
8.3.837.32%
8.0.112.44%
8.9.212.44%
8.3.612.44%
6.1.012.44%
7.4.512.44%
9.0.312.44%
8.5.012.44%
7.6.012.44%
7.4.412.44%
6.0.812.44%
7.0.112.44%
5.8.212.44%
Other00.00%

Kerio (40 servers)

Version Number of Servers Percent
6.7.3922.50%
6.6.1615.00%
6.7.0615.00%
6.5.2410.00%
6.7.137.50%
6.6.237.50%
5.7.925.00%
6.5.125.00%
6.0.1012.50%
6.0.812.50%
6.7.212.50%
6.5.012.50%
6.3.012.50%
Other00.00%

Post.Office (36 servers)

Version Number of Servers Percent
4.41438.89%
4.2.2822.22%
4.3513.89%
3.5.338.33%
4.1.2.425.56%
4.212.78%
3.9.212.78%
3.1.212.78%
4.2.1.112.78%
Other00.00%

ArGoSoft (24 servers)

Version Number of Servers Percent
1.8 (1.8.9.6)625.00%
1.8 (1.8.9.3)312.50%
1.8 (1.8.9.5)312.50%
1.8 (1.8.8.8)28.33%
1.8 (1.8.7.3)28.33%
1.8 (1.8.9.2)28.33%
1.8 (1.8.9.1)28.33%
1.8 (1.8.6.1)14.17%
1.8 (1.8.8.4)14.17%
1.8 (1.8.8.7)14.17%
1.8 (1.8.9.4)14.17%
Other00.00%

GroupWise (15 servers)

Version Number of Servers Percent
18.2.1213.33%
18.5.0213.33%
14.2.116.67%
18.1.116.67%
14.2.316.67%
18.0.016.67%
18.4.116.67%
23.4.016.67%
14.2.216.67%
18.2.016.67%
24.1.016.67%
18.3.116.67%
18.0.216.67%
Other00.00%

OpenVMS (4 servers)

Version Number of Servers Percent
7.3250.00%
8.4125.00%
8.2125.00%
Other00.00%

Gordano Messaging Suite (GMS) (3 servers)

Version Number of Servers Percent
Other3100.00%

VisNetic (3 servers)

Version Number of Servers Percent
9.3.2.0266.67%
8.0.3133.33%
Other00.00%

ModusMail (2 servers)

Version Number of Servers Percent
4.1.361.212100.00%
Other00.00%

Trend Micro (2 servers)

Version Number of Servers Percent
5.182100.00%
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%

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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