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Mail (MX) Server Survey
September 1st, 2017
Report Description |
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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 |
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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 Queried | 2,010,308 | 100.0% |
Number of Servers that didn't respond | 360,591 | 17.94% |
Server didn't open socket | 351,094 | 17.46% |
Server didn't provide banner | 9,497 | 0.47% |
Server provided banner | 1,649,717 | 82.06% |
Server banner identifies software in use | 1,013,597 | 50.42% |
As indicated by the above table, of the 2,010,308 servers
queried, only 1,013,597 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 |
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Server Type |
Number of Servers |
Percent |
Exim | 572,684 | 56.50% |
Postfix | 339,752 | 33.52% |
Sendmail | 47,478 | 4.68% |
MailEnable | 23,007 | 2.27% |
MDaemon | 11,507 | 1.14% |
Microsoft | 9,351 | 0.92% |
IMail | 2,086 | 0.21% |
CommuniGate Pro | 1,793 | 0.18% |
XMail | 1,031 | 0.10% |
WinWebMail | 1,008 | 0.10% |
Lotus Domino | 957 | 0.09% |
SurgeSMTP | 592 | 0.06% |
Qmail Toaster | 464 | 0.05% |
Kerio | 437 | 0.04% |
OpenSMTPD | 319 | 0.03% |
Merak | 280 | 0.03% |
ArGoSoft | 188 | 0.02% |
MagicMail | 174 | 0.02% |
Post.Office | 154 | 0.02% |
Gordano Messaging Suite (GMS) | 84 | 0.01% |
GroupWise | 78 | 0.01% |
Trend Micro | 63 | 0.01% |
InterScan VirusWall | 28 | 0.00% |
VisNetic | 25 | 0.00% |
Mirapoint | 14 | 0.00% |
OpenVMS | 10 | 0.00% |
Mercury | 9 | 0.00% |
Interscan | 6 | 0.00% |
MessageWall | 6 | 0.00% |
WebSTAR V | 6 | 0.00% |
Neon Mail Server | 4 | 0.00% |
ModusMail | 1 | 0.00% |
WebSTAR | 1 | 0.00% |
Detailed Breakdown of Revisions on a Per-Server Basis |
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Exim (572,684 servers) |
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|
Version |
Number of Servers |
Percent |
4.89 | 301,136 | 52.58% |
4.87 | 166,825 | 29.13% |
4.88 | 22,268 | 3.89% |
4.84 | 18,682 | 3.26% |
4.80 | 10,719 | 1.87% |
4.86 | 7,925 | 1.38% |
4.85 | 7,578 | 1.32% |
4.72 | 7,196 | 1.26% |
4.82 | 6,904 | 1.21% |
4.76 | 6,684 | 1.17% |
Other | 16,767 | 2.93% |
Postfix (339,752 servers) |
|
|
Version |
Number of Servers |
Percent |
Other | 339,752 | 100.00% |
Sendmail (47,478 servers) |
|
|
Version |
Number of Servers |
Percent |
8.14.5 | 12,150 | 25.59% |
8.14.4 | 11,040 | 23.25% |
8.13.8 | 7,581 | 15.97% |
8.13.1 | 4,750 | 10.00% |
8.15.2 | 2,578 | 5.43% |
8.14.3 | 2,224 | 4.68% |
8.14.7 | 1,725 | 3.63% |
8.14.9 | 1,351 | 2.85% |
8.14.2 | 476 | 1.00% |
Other | 3,603 | 7.59% |
MailEnable (23,007 servers) |
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|
Version |
Number of Servers |
Percent |
9.00-- | 3,135 | 13.63% |
9.16-- | 1,327 | 5.77% |
8.60-- | 1,218 | 5.29% |
8.53-- | 1,049 | 4.56% |
6.5-- | 875 | 3.80% |
8.51-- | 685 | 2.98% |
1.986-- | 579 | 2.52% |
8.04-- | 501 | 2.18% |
9.75-- | 455 | 1.98% |
8.60-8.60- | 423 | 1.84% |
9.74-- | 354 | 1.54% |
5.10-- | 338 | 1.47% |
8.50-- | 337 | 1.46% |
9.75--9.75 | 314 | 1.36% |
9.53-- | 313 | 1.36% |
8.00-- | 306 | 1.33% |
7.06-- | 237 | 1.03% |
6.0-- | 233 | 1.01% |
Other | 10,328 | 44.89% |
MDaemon (11,507 servers) |
|
|
Version |
Number of Servers |
Percent |
17.0.2 | 1,363 | 11.84% |
16.5.2 | 945 | 8.21% |
13.5.1 | 565 | 4.91% |
11.0.0 | 486 | 4.22% |
11.0.3 | 458 | 3.98% |
13.0.4 | 452 | 3.93% |
13.0.5 | 450 | 3.91% |
13.6.3 | 429 | 3.73% |
16.0.4 | 403 | 3.50% |
16.5.1 | 300 | 2.61% |
12.5.6 | 256 | 2.22% |
17.0.0 | 238 | 2.07% |
15.0.3 | 231 | 2.01% |
12.5.4 | 231 | 2.01% |
14.5.2 | 201 | 1.75% |
10.0.0 | 182 | 1.58% |
10.1.2 | 169 | 1.47% |
15.5.3 | 165 | 1.43% |
16.0.1 | 151 | 1.31% |
10.1.1 | 127 | 1.10% |
10.1.0 | 116 | 1.01% |
Other | 3,589 | 31.19% |
Microsoft (9,351 servers) |
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|
Version |
Number of Servers |
Percent |
6.0.3790.4675 | 5,591 | 59.79% |
7.5.7601.17514 | 1,126 | 12.04% |
8.5.9600.16384 | 768 | 8.21% |
6.0.3790.3959 | 656 | 7.02% |
8.0.9200.16384 | 189 | 2.02% |
5.0.2195.5329 | 172 | 1.84% |
6.0.3790.1830 | 160 | 1.71% |
7.0.6002.18264 | 158 | 1.69% |
5.0.2195.7381 | 101 | 1.08% |
Other | 430 | 4.60% |
IMail (2,086 servers) |
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|
Version |
Number of Servers |
Percent |
12.5.5.115 | 373 | 17.88% |
12.4.1.15 | 175 | 8.39% |
8.22 | 153 | 7.33% |
12.5.3.93 | 152 | 7.29% |
9.23 | 138 | 6.62% |
12.5.4.146 | 131 | 6.28% |
8.15 | 96 | 4.60% |
12.3.0.100 | 95 | 4.55% |
8.05 | 69 | 3.31% |
12.5.6.101 | 67 | 3.21% |
11.03 | 58 | 2.78% |
11.5 | 54 | 2.59% |
7.07 | 32 | 1.53% |
12.5.1.60 | 30 | 1.44% |
10.02 | 27 | 1.29% |
7.15 | 27 | 1.29% |
12.5.5.117 | 26 | 1.25% |
11.02 | 23 | 1.10% |
10.01 | 22 | 1.05% |
Other | 338 | 16.20% |
CommuniGate Pro (1,793 servers) |
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|
Version |
Number of Servers |
Percent |
5.1.16 | 133 | 7.42% |
6.1.16 | 114 | 6.36% |
6.1.16. | 102 | 5.69% |
6.2 | 44 | 2.45% |
6.1.11 | 40 | 2.23% |
6.1.10 | 35 | 1.95% |
5.4.11. | 34 | 1.90% |
5.3.13. | 33 | 1.84% |
5.4.11 | 31 | 1.73% |
5.2.20 | 31 | 1.73% |
6.0.11 | 29 | 1.62% |
6.0.11. | 28 | 1.56% |
6.1.13 | 27 | 1.51% |
6.1.10. | 27 | 1.51% |
6.1.11. | 27 | 1.51% |
5.2.20. | 26 | 1.45% |
6.1.15. | 25 | 1.39% |
6.1.2. | 24 | 1.34% |
5.1.16. | 23 | 1.28% |
6.0.9 | 23 | 1.28% |
5.2.3 | 23 | 1.28% |
5.0.14. | 23 | 1.28% |
6.0.9. | 22 | 1.23% |
6.1.12 | 22 | 1.23% |
6.1.15 | 21 | 1.17% |
6.1.13. | 19 | 1.06% |
6.1.14. | 19 | 1.06% |
6.1.2 | 19 | 1.06% |
6.1.14 | 18 | 1.00% |
6.1.12. | 18 | 1.00% |
6.0.10. | 18 | 1.00% |
Other | 715 | 39.88% |
XMail (1,031 servers) |
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|
Version |
Number of Servers |
Percent |
1.27 | 441 | 42.77% |
1.22 | 335 | 32.49% |
1.25 | 79 | 7.66% |
1.26 | 68 | 6.60% |
1.24 | 38 | 3.69% |
1.21 | 21 | 2.04% |
1.23 | 14 | 1.36% |
Other | 35 | 3.39% |
WinWebMail (1,008 servers) |
|
|
Version |
Number of Servers |
Percent |
3.9.0.7 | 225 | 22.32% |
3.8.1.3 | 142 | 14.09% |
3.9.0.1 | 70 | 6.94% |
3.7.6.1 | 65 | 6.45% |
3.8.0.1 | 61 | 6.05% |
3.8.1.5 | 49 | 4.86% |
3.8.1.1 | 37 | 3.67% |
3.9.2.1 | 36 | 3.57% |
3.9.3.1 | 36 | 3.57% |
3.8.5.1 | 36 | 3.57% |
3.8.6.1 | 35 | 3.47% |
3.7.3.1 | 33 | 3.27% |
3.7.7.3 | 28 | 2.78% |
3.8.2.1 | 23 | 2.28% |
3.7.1.1 | 19 | 1.88% |
3.8.3.1 | 16 | 1.59% |
3.9.5.1 | 16 | 1.59% |
3.7.0.5 | 11 | 1.09% |
Other | 70 | 6.94% |
Lotus Domino (957 servers) |
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|
Version |
Number of Servers |
Percent |
8.5.3FP6 | 182 | 19.02% |
8.5.3 | 126 | 13.17% |
8.5.2 | 43 | 4.49% |
8.5 | 36 | 3.76% |
8.5.1 | 36 | 3.76% |
7.0.2 | 36 | 3.76% |
8.5.3FP2 | 27 | 2.82% |
8.5.2FP4 | 26 | 2.72% |
8.5.3FP3 | 24 | 2.51% |
8.5.3FP1 | 24 | 2.51% |
8.5.3FP4 | 22 | 2.30% |
7.0.3 | 21 | 2.19% |
8.5.2FP3 | 19 | 1.99% |
8.5.2FP2 | 18 | 1.88% |
8.5.3FP5 | 17 | 1.78% |
8.0 | 17 | 1.78% |
8.0.1 | 16 | 1.67% |
7.0.4 | 15 | 1.57% |
8.5.1FP5 | 15 | 1.57% |
7.0 | 14 | 1.46% |
7.0.1 | 13 | 1.36% |
6.5.1 | 13 | 1.36% |
6.5 | 11 | 1.15% |
7.0.3FP1 | 11 | 1.15% |
Other | 175 | 18.29% |
SurgeSMTP (592 servers) |
|
|
Version |
Number of Servers |
Percent |
7.2i-1 | 88 | 14.86% |
7.1e-1 | 82 | 13.85% |
7.3c3-3 | 66 | 11.15% |
6.5a2-2 | 35 | 5.91% |
7.2a-1 | 34 | 5.74% |
7.2e-2 | 33 | 5.57% |
6.7c-1 | 26 | 4.39% |
6.9c-1 | 24 | 4.05% |
6.5a-1 | 20 | 3.38% |
7.0c2-2 | 18 | 3.04% |
3.9e-1 | 15 | 2.53% |
5.2a-1 | 13 | 2.20% |
7.3d-5 | 11 | 1.86% |
6.1c-1 | 9 | 1.52% |
6.4a-1 | 9 | 1.52% |
4.0u4-4 | 8 | 1.35% |
7.3d-4 | 7 | 1.18% |
3.8k4-4 | 7 | 1.18% |
Other | 87 | 14.70% |
Qmail Toaster (464 servers) |
|
|
Version |
Number of Servers |
Percent |
1.3 | 375 | 80.82% |
1.03 | 63 | 13.58% |
1.2 | 11 | 2.37% |
1.03.5 | 7 | 1.51% |
Other | 8 | 1.72% |
Kerio (437 servers) |
|
|
Version |
Number of Servers |
Percent |
6.7.3 | 96 | 21.97% |
6.7.0 | 50 | 11.44% |
6.5.2 | 43 | 9.84% |
6.6.2 | 42 | 9.61% |
6.7.2 | 29 | 6.64% |
6.5.0 | 26 | 5.95% |
6.6.1 | 18 | 4.12% |
6.4.1 | 17 | 3.89% |
6.7.1 | 17 | 3.89% |
6.3.1 | 15 | 3.43% |
6.5.1 | 12 | 2.75% |
6.3.0 | 11 | 2.52% |
6.4.0 | 10 | 2.29% |
6.1.3 | 8 | 1.83% |
6.6.0 | 7 | 1.60% |
6.4.2 | 5 | 1.14% |
Other | 31 | 7.09% |
OpenSMTPD (319 servers) |
|
|
Version |
Number of Servers |
Percent |
Other | 319 | 100.00% |
Merak (280 servers) |
|
|
Version |
Number of Servers |
Percent |
8.0.3 | 81 | 28.93% |
8.9.1 | 49 | 17.50% |
8.5.0 | 24 | 8.57% |
7.5.2 | 16 | 5.71% |
7.4.5 | 15 | 5.36% |
8.3.8 | 14 | 5.00% |
7.6.1 | 12 | 4.29% |
7.6.4 | 9 | 3.21% |
7.4.2 | 5 | 1.79% |
7.0.1 | 5 | 1.79% |
6.1.0 | 4 | 1.43% |
9.0.3 | 4 | 1.43% |
7.2.0 | 4 | 1.43% |
5.9.4 | 3 | 1.07% |
4.2.1 | 3 | 1.07% |
6.0.8 | 3 | 1.07% |
Other | 29 | 10.36% |
ArGoSoft (188 servers) |
|
|
Version |
Number of Servers |
Percent |
1.8 (1.8.9.6) | 68 | 36.17% |
1.8 (1.8.9.5) | 22 | 11.70% |
1.8 (1.8.9.3) | 21 | 11.17% |
1.8 (1.8.9.1) | 20 | 10.64% |
1.8 (1.8.7.3) | 6 | 3.19% |
1.8 (1.8.8.7) | 6 | 3.19% |
1.8 (1.8.8.8) | 5 | 2.66% |
1.8 (1.8.9.2) | 5 | 2.66% |
1.8 (1.8.6.0) | 5 | 2.66% |
1.8 (1.8.8.9) | 4 | 2.13% |
1.8 (1.8.7.6) | 2 | 1.06% |
1.8 (1.8.8.4) | 2 | 1.06% |
1.8 (1.8.5.8) | 2 | 1.06% |
1.8 (1.8.9.4) | 2 | 1.06% |
1.8 (1.8.2.1) | 2 | 1.06% |
1.8 (1.8.5.9) | 2 | 1.06% |
Other | 14 | 7.45% |
MagicMail (174 servers) |
|
|
Version |
Number of Servers |
Percent |
Other | 174 | 100.00% |
Post.Office (154 servers) |
|
|
Version |
Number of Servers |
Percent |
4.2.2 | 30 | 19.48% |
4.3 | 30 | 19.48% |
4.1.2.4 | 20 | 12.99% |
3.5.3 | 16 | 10.39% |
4.2.1.3 | 8 | 5.19% |
3.9.2.3 | 5 | 3.25% |
4.2.1.1 | 5 | 3.25% |
3.1.2 | 4 | 2.60% |
3.9.2 | 3 | 1.95% |
4.1.1 | 3 | 1.95% |
3.5.1 | 3 | 1.95% |
3.5.4 | 2 | 1.30% |
4.0.1 | 2 | 1.30% |
4.2 | 2 | 1.30% |
4.1.0.3 | 2 | 1.30% |
4.1.2.3 | 2 | 1.30% |
3.8.7.4 | 2 | 1.30% |
3.9.1.3 | 2 | 1.30% |
3.5.3J | 2 | 1.30% |
Other | 11 | 7.14% |
Gordano Messaging Suite (GMS) (84 servers) |
|
|
Version |
Number of Servers |
Percent |
Other | 84 | 100.00% |
GroupWise (78 servers) |
|
|
Version |
Number of Servers |
Percent |
14.2.2 | 17 | 21.79% |
14.2.1 | 12 | 15.38% |
6.5.7 | 7 | 8.97% |
14.2.0 | 6 | 7.69% |
14.0.1 | 6 | 7.69% |
14.0.0 | 4 | 5.13% |
7.0.3 | 3 | 3.85% |
7.0.4 | 3 | 3.85% |
8.0.3 | 2 | 2.56% |
12.0.4 | 2 | 2.56% |
12.0.1 | 2 | 2.56% |
14.0.2 | 2 | 2.56% |
6.0.4 | 2 | 2.56% |
7.0.2 | 1 | 1.28% |
6.5.0 | 1 | 1.28% |
6.0.3 | 1 | 1.28% |
6.5.5 | 1 | 1.28% |
7.0.1 | 1 | 1.28% |
8.0.1 | 1 | 1.28% |
6.5.2 | 1 | 1.28% |
8.0.2 | 1 | 1.28% |
6.0.2 | 1 | 1.28% |
12.0.2 | 1 | 1.28% |
Other | 0 | 0.00% |
Trend Micro (63 servers) |
|
|
Version |
Number of Servers |
Percent |
5.7 | 20 | 31.75% |
5.18 | 13 | 20.63% |
5.5 | 11 | 17.46% |
7.0 | 8 | 12.70% |
7.5 | 5 | 7.94% |
7.1 | 2 | 3.17% |
3.53 | 2 | 3.17% |
8.5 | 1 | 1.59% |
8 | 1 | 1.59% |
Other | 0 | 0.00% |
InterScan VirusWall (28 servers) |
|
|
Version |
Number of Servers |
Percent |
Other | 28 | 100.00% |
VisNetic (25 servers) |
|
|
Version |
Number of Servers |
Percent |
9.3.2.0 | 8 | 32.00% |
5.0.2.3 | 2 | 8.00% |
5.8.6.6 | 2 | 8.00% |
5.5.8.3 | 2 | 8.00% |
6.2.2.0 | 1 | 4.00% |
8.0.3 | 1 | 4.00% |
9.1.4.0 | 1 | 4.00% |
8.5.0.5 | 1 | 4.00% |
7.6.1.0 | 1 | 4.00% |
9.1.4.1 | 1 | 4.00% |
8.0.3.1 | 1 | 4.00% |
5.3.5.0 | 1 | 4.00% |
5.0.2.0 | 1 | 4.00% |
9.1.4.1 provided by Techfount Systems Pte Ltd | 1 | 4.00% |
8.5.0.8 | 1 | 4.00% |
Other | 0 | 0.00% |
Mirapoint (14 servers) |
|
|
Version |
Number of Servers |
Percent |
4.4.2a-FCS | 3 | 21.43% |
4.3.5-GA | 3 | 21.43% |
4.4.3-GA | 3 | 21.43% |
4.4.4-GA | 1 | 7.14% |
3.10.10a-GA | 1 | 7.14% |
4.4.3a-GA | 1 | 7.14% |
3.7.5a-GA | 1 | 7.14% |
4.4.6-GA | 1 | 7.14% |
Other | 0 | 0.00% |
OpenVMS (10 servers) |
|
|
Version |
Number of Servers |
Percent |
7.3 | 6 | 60.00% |
8.4 | 3 | 30.00% |
8.2 | 1 | 10.00% |
Other | 0 | 0.00% |
Mercury (9 servers) |
|
|
Version |
Number of Servers |
Percent |
3.32 | 4 | 44.44% |
1.48 | 3 | 33.33% |
3.21 | 1 | 11.11% |
4.x | 1 | 11.11% |
Other | 0 | 0.00% |
Interscan (6 servers) |
|
|
Version |
Number of Servers |
Percent |
3.81-Build_1022 | 2 | 33.33% |
3.81-Build_1084 | 1 | 16.67% |
3.8-Build_3013 | 1 | 16.67% |
3.8-Build_1080 | 1 | 16.67% |
3.5 (build 1294) | 1 | 16.67% |
Other | 0 | 0.00% |
MessageWall (6 servers) |
|
|
Version |
Number of Servers |
Percent |
1.0.8 | 6 | 100.00% |
Other | 0 | 0.00% |
WebSTAR V (6 servers) |
|
|
Version |
Number of Servers |
Percent |
5.4.1 | 3 | 50.00% |
5.4.0 | 1 | 16.67% |
5.3.2 | 1 | 16.67% |
5.3.4 | 1 | 16.67% |
Other | 0 | 0.00% |
Neon Mail Server (4 servers) |
|
|
Version |
Number of Servers |
Percent |
3.1.0 | 2 | 50.00% |
3.1.3 | 1 | 25.00% |
3.0.7 | 1 | 25.00% |
Other | 0 | 0.00% |
ModusMail (1 servers) |
|
|
Version |
Number of Servers |
Percent |
4.1.361.21 | 1 | 100.00% |
Other | 0 | 0.00% |
WebSTAR (1 servers) |
|
|
Version |
Number of Servers |
Percent |
Other | 1 | 100.00% |