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You are viewing an outdated report. The latest version of this report was published on April 1st, 2020


    
Mail (MX) Server Survey
March 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 Queried1,634,791   100.0%
Number of Servers that didn't respond296,59618.14%
    Server didn't open socket291,75817.85%
    Server didn't provide banner4,8380.30%
Server provided banner1,338,19581.86%
Server banner identifies software in use837,18551.21%

As indicated by the above table, of the 1,634,791 servers queried, only 837,185 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
Exim483,66757.77%
Postfix287,08234.29%
Sendmail32,0823.83%
MailEnable17,7342.12%
MDaemon6,4230.77%
Microsoft3,9280.47%
IMail1,1800.14%
CommuniGate Pro1,1390.14%
XMail7170.09%
Qmail Toaster6820.08%
SurgeSMTP4860.06%
Lotus Domino4170.05%
WinWebMail3810.05%
OpenSMTPD3450.04%
Kerio2080.02%
MagicMail1720.02%
Merak1360.02%
Post.Office1110.01%
ArGoSoft860.01%
GroupWise750.01%
Gordano Messaging Suite (GMS)500.01%
Trend Micro360.00%
OpenVMS130.00%
InterScan VirusWall100.00%
VisNetic90.00%
WebSTAR V40.00%
Interscan30.00%
Mercury30.00%
ModusMail20.00%
MessageWall20.00%
Mirapoint10.00%
Neon Mail Server10.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (483,667 servers)

Version Number of Servers Percent
4.92354,63073.32%
4.9133,3836.90%
4.92.319,6424.06%
4.93.0.410,6472.20%
4.8710,1032.09%
4.938,5391.77%
4.898,3931.74%
4.847,1771.48%
4.92.25,6121.16%
4.905,0941.05%
Other20,4474.23%

Postfix (287,082 servers)

Version Number of Servers Percent
Other287,082100.00%

Sendmail (32,082 servers)

Version Number of Servers Percent
8.15.212,95840.39%
8.14.45,79218.05%
8.13.82,8889.00%
8.14.72,8548.90%
8.14.52,4527.64%
8.13.11,8765.85%
8.14.98352.60%
8.14.35791.80%
Other1,8485.76%

MailEnable (17,734 servers)

Version Number of Servers Percent
10.25--5,57431.43%
10.27--1,6199.13%
9.00--9335.26%
10.12--3922.21%
9.16--3271.84%
8.60--3071.73%
8.53--2381.34%
6.5--2121.20%
10.20--2091.18%
10.29--10.291991.12%
10.29--1921.08%
9.00--9.001831.03%
Other7,34941.44%

MDaemon (6,423 servers)

Version Number of Servers Percent
19.5.365410.18%
13.5.14426.88%
13.6.32984.64%
13.0.42724.23%
13.0.52584.02%
11.0.02393.72%
11.0.32363.67%
19.5.12173.38%
19.0.32053.19%
16.5.21963.05%
19.5.41582.46%
12.5.61462.27%
12.5.41392.16%
14.5.21332.07%
10.1.2851.32%
10.0.0841.31%
18.5.1801.25%
15.0.3791.23%
18.5.3731.14%
16.0.4711.11%
19.5.0711.11%
10.1.0671.04%
Other2,22034.56%

Microsoft (3,928 servers)

Version Number of Servers Percent
6.0.3790.46751,70143.30%
8.5.9600.1638458614.92%
7.5.7601.1751445811.66%
10.0.14393.26082626.67%
6.0.3790.39592315.88%
5.0.2195.53291183.00%
8.0.9200.163841082.75%
6.0.3790.1830591.50%
7.0.6002.18264581.48%
5.0.2195.6713531.35%
10.0.17763.1501.27%
5.0.2195.7381431.09%
Other2015.12%

IMail (1,180 servers)

Version Number of Servers Percent
12.5.7.5917815.08%
12.5.6.10114912.63%
12.4.1.151139.58%
9.23705.93%
12.5.3.93695.85%
8.22584.92%
12.5.5.115534.49%
8.15453.81%
12.3.0.100433.64%
8.05403.39%
12.5.8.41363.05%
12.5.4.146342.88%
12.5.7.58292.46%
11.03262.20%
10.02211.78%
11.5171.44%
12.5.5.117171.44%
12.5.6.105161.36%
8.00131.10%
7.15121.02%
Other14111.95%

CommuniGate Pro (1,139 servers)

Version Number of Servers Percent
6.2.1412510.97%
6.2.12635.53%
6.0.11433.78%
5.4.11393.42%
6.2.15383.34%
6.1.20383.34%
6.1.16373.25%
5.3.13353.07%
5.2.20332.90%
6.1.18272.37%
5.1.16252.19%
6.2.13242.11%
6.0.9232.02%
6.2.10211.84%
6.2.7191.67%
6.1.12161.40%
6.1.11161.40%
6.2.9151.32%
6.1.10151.32%
6.1.13131.14%
5.2.3131.14%
5.3.15121.05%
6.2.1121.05%
Other43738.37%

XMail (717 servers)

Version Number of Servers Percent
1.2735950.07%
1.2222831.80%
1.26425.86%
1.25344.74%
1.24223.07%
Other324.46%

Qmail Toaster (682 servers)

Version Number of Servers Percent
1.350674.19%
1.0315522.73%
1.03.591.32%
Other121.76%

SurgeSMTP (486 servers)

Version Number of Servers Percent
7.3o4-413928.60%
7.3e2-25511.32%
7.4e-1408.23%
7.1e-1275.56%
7.3i2-2204.12%
6.5a2-2204.12%
7.4a-1193.91%
7.2i-1153.09%
7.2a-1142.88%
6.7c-1142.88%
3.9e-1102.06%
7.0c2-291.85%
6.9c-171.44%
6.5a-161.23%
7.2e-261.23%
4.0u4-461.23%
Other7916.26%

Lotus Domino (417 servers)

Version Number of Servers Percent
8.5.3FP68019.18%
8.5.36214.87%
8.5.2245.76%
7.0.2163.84%
8.5.1143.36%
8.5133.12%
7.0122.88%
8.5.3FP3112.64%
8.5.2FP2102.40%
8.0.192.16%
8.5.2FP392.16%
7.0.392.16%
8.5.3FP481.92%
8.5.3FP281.92%
8.5.3FP171.68%
8.5.1FP571.68%
8.5.3FP561.44%
8.5.2FP4HF75961.44%
8.061.44%
6.5.461.44%
8.5.2FP461.44%
6.551.20%
7.0.4FP251.20%
6.5.551.20%
8.5.1FP451.20%
Other6816.31%

WinWebMail (381 servers)

Version Number of Servers Percent
4.2.0.17920.73%
3.9.0.76517.06%
3.8.1.34511.81%
3.9.0.1266.82%
3.8.0.1194.99%
3.7.6.1153.94%
4.0.0.1143.67%
3.8.1.5123.15%
4.1.0.1102.62%
3.8.1.1102.62%
3.9.2.192.36%
3.7.3.192.36%
3.8.5.171.84%
3.8.6.171.84%
3.8.3.161.57%
3.8.2.151.31%
3.9.3.151.31%
3.7.0.541.05%
3.7.1.141.05%
3.9.5.341.05%
3.7.7.341.05%
1.041.05%
Other184.72%

OpenSMTPD (345 servers)

Version Number of Servers Percent
Other345100.00%

Kerio (208 servers)

Version Number of Servers Percent
6.7.34923.56%
6.7.03014.42%
6.7.22110.10%
6.5.2199.13%
6.6.2167.69%
6.7.1104.81%
6.6.1104.81%
6.5.0104.81%
6.4.173.37%
6.4.062.88%
6.1.052.40%
6.6.041.92%
6.3.131.44%
6.1.331.44%
6.3.031.44%
Other125.77%

MagicMail (172 servers)

Version Number of Servers Percent
Other172100.00%

Merak (136 servers)

Version Number of Servers Percent
8.9.13223.53%
8.0.33122.79%
7.6.1107.35%
7.4.596.62%
8.5.075.15%
9.0.375.15%
8.3.864.41%
7.6.442.94%
7.5.242.94%
6.0.832.21%
7.0.121.47%
7.6.021.47%
4.4.121.47%
7.4.221.47%
Other1511.03%

Post.Office (111 servers)

Version Number of Servers Percent
4.33027.03%
4.2.21917.12%
4.41614.41%
4.1.2.4119.91%
3.5.387.21%
4.2.1.354.50%
4.1.132.70%
3.5.132.70%
4.0.121.80%
3.9.221.80%
Other1210.81%

ArGoSoft (86 servers)

Version Number of Servers Percent
1.8 (1.8.9.6)3034.88%
1.8 (1.8.9.3)1315.12%
1.8 (1.8.9.5)1011.63%
1.8 (1.8.9.1)78.14%
1.8 (1.8.8.8)33.49%
1.8 (1.8.7.6)33.49%
1.8 (1.8.6.0)22.33%
1.8 (1.8.9.2)22.33%
1.8 (1.8.8.7)22.33%
1.8 (1.8.2.1)22.33%
1.8 (1.8.8.9)22.33%
1.8 (1.8.7.3)22.33%
1.8 (1.8.5.8)11.16%
1.8 (1.8.5.5)11.16%
1.8 (1.8.8.4)11.16%
1.8 (1.8.6.1)11.16%
1.8 (1.8.9.0)11.16%
1.8 (1.8.9.4)11.16%
1.8 (1.8.3.5)11.16%
1.8 (1.8.2.5)11.16%
Other00.00%

GroupWise (75 servers)

Version Number of Servers Percent
18.1.11621.33%
14.2.21013.33%
18.1.079.33%
18.2.079.33%
14.2.156.67%
18.0.034.00%
14.2.334.00%
14.0.134.00%
18.0.234.00%
14.2.034.00%
14.0.022.67%
8.0.322.67%
6.5.211.33%
6.0.211.33%
7.0.211.33%
7.0.311.33%
6.5.011.33%
6.5.411.33%
6.5.711.33%
6.5.611.33%
12.0.111.33%
6.5.511.33%
6.0.411.33%
Other00.00%

Gordano Messaging Suite (GMS) (50 servers)

Version Number of Servers Percent
Other50100.00%

Trend Micro (36 servers)

Version Number of Servers Percent
5.7925.00%
5.18925.00%
5.5513.89%
7.0513.89%
7.5411.11%
7.5ready12.78%
812.78%
9.012.78%
7.112.78%
Other00.00%

OpenVMS (13 servers)

Version Number of Servers Percent
8.4753.85%
7.3430.77%
8.3215.38%
Other00.00%

InterScan VirusWall (10 servers)

Version Number of Servers Percent
Other10100.00%

VisNetic (9 servers)

Version Number of Servers Percent
9.3.2.0777.78%
8.0.3111.11%
5.5.8.3111.11%
Other00.00%

WebSTAR V (4 servers)

Version Number of Servers Percent
5.4.1375.00%
5.3.2125.00%
Other00.00%

Interscan (3 servers)

Version Number of Servers Percent
3.8-Build_3013133.33%
3.8-Build_1080133.33%
3.81-Build_1022133.33%
Other00.00%

Mercury (3 servers)

Version Number of Servers Percent
1.48266.67%
3.32133.33%
Other00.00%

ModusMail (2 servers)

Version Number of Servers Percent
4.1.361.212100.00%
Other00.00%

MessageWall (2 servers)

Version Number of Servers Percent
1.0.82100.00%
Other00.00%

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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