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You are viewing an outdated report. The latest version of this report was published on November 1st, 2021


    
Mail (MX) Server Survey
December 1st, 2020

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 Queried1,105,696   100.0%
Number of Servers that didn't respond173,89115.73%
    Server didn't open socket170,90715.46%
    Server didn't provide banner2,9840.27%
Server provided banner931,80584.27%
Server banner identifies software in use596,87653.98%

As indicated by the above table, of the 1,105,696 servers queried, only 596,876 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
Exim357,32559.87%
Postfix195,95432.83%
Sendmail21,5903.62%
MailEnable12,3872.08%
MDaemon3,7810.63%
Microsoft1,9680.33%
CommuniGate Pro7620.13%
IMail6250.10%
Qmail Toaster4920.08%
XMail4600.08%
SurgeSMTP3270.05%
OpenSMTPD2440.04%
Lotus Domino2180.04%
WinWebMail1680.03%
MagicMail1270.02%
Kerio1130.02%
Merak960.02%
Post.Office670.01%
ArGoSoft550.01%
GroupWise480.01%
Gordano Messaging Suite (GMS)240.00%
Trend Micro170.00%
OpenVMS90.00%
VisNetic70.00%
InterScan VirusWall30.00%
ModusMail20.00%
Interscan20.00%
Mercury10.00%
WebSTAR V10.00%
WebSTAR10.00%
Mirapoint10.00%
Neon Mail Server10.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (357,325 servers)

Version Number of Servers Percent
4.93269,16375.33%
4.9418,3355.13%
4.9115,5134.34%
4.9210,6402.98%
4.92.37,7172.16%
4.93.0.45,3651.50%
4.895,2281.46%
4.874,5971.29%
4.844,1441.16%
Other16,6234.65%

Postfix (195,954 servers)

Version Number of Servers Percent
Other195,954100.00%

Sendmail (21,590 servers)

Version Number of Servers Percent
8.15.210,48748.57%
8.14.43,50616.24%
8.14.72,0259.38%
8.13.81,5597.22%
8.14.51,3736.36%
8.14.96523.02%
8.13.14532.10%
8.14.33161.46%
Other1,2195.65%

MailEnable (12,387 servers)

Version Number of Servers Percent
10.27--3,06024.70%
10.25--2,56320.69%
9.00--4743.83%
10.29--2742.21%
10.31--2411.95%
10.30--2321.87%
9.16--1821.47%
10.31--10.311821.47%
10.12--1781.44%
10.31-10.31-1601.29%
9.00--9.001411.14%
8.60--1321.07%
Other4,56836.88%

MDaemon (3,781 servers)

Version Number of Servers Percent
19.5.541010.84%
20.0.33038.01%
13.5.12476.53%
13.0.51624.28%
13.0.41544.07%
11.0.31393.68%
11.0.01313.46%
13.6.31283.39%
16.5.21052.78%
20.0.2912.41%
12.5.6842.22%
12.5.4802.12%
14.5.2782.06%
19.5.4591.56%
10.1.2481.27%
10.0.0431.14%
10.1.0411.08%
15.0.3401.06%
19.0.3391.03%
16.0.4391.03%
Other1,36035.97%

Microsoft (1,968 servers)

Version Number of Servers Percent
6.0.3790.467576939.08%
8.5.9600.1638431516.01%
7.5.7601.1751420610.47%
10.0.14393.26081758.89%
6.0.3790.39591065.39%
10.0.17763.1884.47%
5.0.2195.5329693.51%
8.0.9200.16384462.34%
5.0.2195.6713281.42%
6.0.3790.1830271.37%
7.0.6002.18264231.17%
5.0.2195.7381211.07%
Other954.83%

CommuniGate Pro (762 servers)

Version Number of Servers Percent
6.2.148711.42%
6.2.15547.09%
6.1.20374.86%
6.1.16273.54%
5.3.13273.54%
6.2.12263.41%
6.0.11222.89%
5.2.20212.76%
6.1.18212.76%
5.4.11192.49%
6.3.3192.49%
5.1.16162.10%
6.0.9131.71%
6.2.13121.57%
6.1.9101.31%
6.2.991.18%
6.2.791.18%
6.0.791.18%
5.4.881.05%
6.2.1081.05%
5.3.1581.05%
6.1.1081.05%
6.1.1481.05%
Other28437.27%

IMail (625 servers)

Version Number of Servers Percent
12.5.8.418413.44%
12.5.6.1017411.84%
12.5.7.597211.52%
12.4.1.15528.32%
12.5.3.93355.60%
9.23345.44%
8.22345.44%
12.5.5.115274.32%
8.05264.16%
12.3.0.100243.84%
8.15223.52%
10.02152.40%
12.5.4.146121.92%
12.5.6.105111.76%
11.591.44%
12.5.7.5891.44%
12.5.5.11791.44%
7.0781.28%
11.0371.12%
Other619.76%

Qmail Toaster (492 servers)

Version Number of Servers Percent
1.336774.59%
1.0311222.76%
1.03.571.42%
Other61.22%

XMail (460 servers)

Version Number of Servers Percent
1.2722949.78%
1.2215333.26%
1.26235.00%
1.25204.35%
1.24132.83%
1.1551.09%
Other173.70%

SurgeSMTP (327 servers)

Version Number of Servers Percent
7.4o-16018.35%
7.3o4-44814.68%
7.3e2-2257.65%
7.4e-1216.42%
7.1e-1175.20%
6.5a2-2144.28%
7.3i2-2113.36%
7.2i-1103.06%
6.7c-192.75%
7.2a-172.14%
7.4m-172.14%
7.5a-161.83%
3.9e-161.83%
7.4q-161.83%
6.5a-151.53%
7.4g-151.53%
6.9c-141.22%
Other6620.18%

OpenSMTPD (244 servers)

Version Number of Servers Percent
Other244100.00%

Lotus Domino (218 servers)

Version Number of Servers Percent
8.5.3FP64118.81%
8.5.33716.97%
8.5.1125.50%
8.5.2104.59%
8.5.2FP294.13%
7.083.67%
7.0.273.21%
8.562.75%
7.0.362.75%
8.5.3FP552.29%
8.5.3FP452.29%
8.5.2FP341.83%
8.5.3FP341.83%
8.5.3FP141.83%
7.0.441.83%
6.5.441.83%
8.0.131.38%
5.0.831.38%
8.5.2FP4HF75931.38%
Other4319.72%

WinWebMail (168 servers)

Version Number of Servers Percent
4.2.0.14325.60%
3.9.0.73621.43%
3.8.1.3137.74%
3.7.6.174.17%
4.0.0.174.17%
3.7.3.163.57%
3.8.5.163.57%
4.3.0.163.57%
3.8.6.152.98%
3.9.0.152.98%
3.8.3.142.38%
3.8.1.142.38%
3.8.0.142.38%
4.1.0.142.38%
1.031.79%
3.9.2.131.79%
3.8.1.521.19%
3.7.5.121.19%
Other84.76%

MagicMail (127 servers)

Version Number of Servers Percent
Other127100.00%

Kerio (113 servers)

Version Number of Servers Percent
6.7.32522.12%
6.7.01815.93%
6.7.21311.50%
6.6.2119.73%
6.6.197.96%
6.7.187.08%
6.5.265.31%
6.5.065.31%
6.4.132.65%
6.3.021.77%
5.7.921.77%
6.5.121.77%
5.7.621.77%
Other65.31%

Merak (96 servers)

Version Number of Servers Percent
8.9.12526.04%
8.0.32526.04%
7.6.188.33%
8.5.066.25%
9.0.355.21%
7.4.555.21%
8.3.844.17%
7.5.222.08%
7.6.022.08%
7.6.422.08%
6.0.822.08%
8.3.611.04%
8.9.211.04%
8.0.111.04%
6.1.011.04%
5.8.211.04%
8.9.711.04%
7.4.411.04%
7.0.111.04%
8.9.011.04%
6.0.311.04%
Other00.00%

Post.Office (67 servers)

Version Number of Servers Percent
4.31826.87%
4.2.21522.39%
4.41420.90%
4.1.2.457.46%
3.5.357.46%
3.9.222.99%
4.1.122.99%
3.5.3J11.49%
3.6.211.49%
4.1.0.311.49%
4.111.49%
3.1.211.49%
4.2.1.111.49%
Other00.00%

ArGoSoft (55 servers)

Version Number of Servers Percent
1.8 (1.8.9.6)1730.91%
1.8 (1.8.9.3)1120.00%
1.8 (1.8.9.5)712.73%
1.8 (1.8.9.1)47.27%
1.8 (1.8.7.3)23.64%
1.8 (1.8.8.9)23.64%
1.8 (1.8.8.8)23.64%
1.8 (1.8.9.2)23.64%
1.8 (1.8.6.1)11.82%
1.8 (1.8.7.6)11.82%
1.8 (1.8.5.8)11.82%
1.8 (1.8.8.4)11.82%
1.8 (1.8.2.1)11.82%
1.8 (1.8.6.0)11.82%
1.8 (1.8.9.4)11.82%
1.8 (1.8.2.5)11.82%
Other00.00%

GroupWise (48 servers)

Version Number of Servers Percent
18.1.1816.67%
18.2.1612.50%
18.2.048.33%
14.2.048.33%
14.2.148.33%
18.1.036.25%
14.2.236.25%
18.0.236.25%
14.0.024.17%
18.0.024.17%
14.2.324.17%
6.0.212.08%
7.0.212.08%
14.0.112.08%
7.0.112.08%
6.5.012.08%
6.5.712.08%
8.0.212.08%
Other00.00%

Gordano Messaging Suite (GMS) (24 servers)

Version Number of Servers Percent
Other24100.00%

Trend Micro (17 servers)

Version Number of Servers Percent
5.7635.29%
5.18423.53%
5.5211.76%
7.5211.76%
7.0211.76%
7.115.88%
Other00.00%

OpenVMS (9 servers)

Version Number of Servers Percent
8.4555.56%
7.3222.22%
8.2111.11%
8.3111.11%
Other00.00%

VisNetic (7 servers)

Version Number of Servers Percent
9.3.2.0571.43%
8.0.3114.29%
6.2.2.0114.29%
Other00.00%

InterScan VirusWall (3 servers)

Version Number of Servers Percent
Other3100.00%

ModusMail (2 servers)

Version Number of Servers Percent
4.1.361.212100.00%
Other00.00%

Interscan (2 servers)

Version Number of Servers Percent
3.8-Build_3013150.00%
3.8-Build_1080150.00%
Other00.00%

Mercury (1 servers)

Version Number of Servers Percent
1.481100.00%
Other00.00%

WebSTAR V (1 servers)

Version Number of Servers Percent
5.4.11100.00%
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%

Neon Mail Server (1 servers)

Version Number of Servers Percent
3.1.21100.00%
Other00.00%



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