You are viewing an outdated report. The latest version of this report was published on February 1st, 2025
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Mail (MX) Server Survey
February 1st, 2014
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 |
 |
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 | 1,820,568 | 100.0% |
Number of Servers that didn't respond | 318,423 | 17.49% |
Server didn't open socket | 310,908 | 17.08% |
Server didn't provide banner | 7,515 | 0.41% |
Server provided banner | 1,502,145 | 82.51% |
Server banner identifies software in use | 840,345 | 46.16% |
As indicated by the above table, of the 1,820,568 servers
queried, only 840,345 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 | 425,543 | 50.64% |
Postfix | 235,348 | 28.01% |
Sendmail | 77,485 | 9.22% |
Microsoft | 45,916 | 5.46% |
MailEnable | 24,027 | 2.86% |
MDaemon | 14,641 | 1.74% |
IMail | 4,152 | 0.49% |
Lotus Domino | 2,633 | 0.31% |
CommuniGate Pro | 2,109 | 0.25% |
WinWebMail | 1,907 | 0.23% |
XMail | 1,400 | 0.17% |
Qmail Toaster | 1,062 | 0.13% |
Kerio | 884 | 0.11% |
SurgeSMTP | 765 | 0.09% |
Merak | 688 | 0.08% |
ArGoSoft | 409 | 0.05% |
Post.Office | 230 | 0.03% |
GroupWise | 225 | 0.03% |
MagicMail | 210 | 0.02% |
Gordano Messaging Suite (GMS) | 179 | 0.02% |
Trend Micro | 165 | 0.02% |
InterScan VirusWall | 75 | 0.01% |
Mirapoint | 63 | 0.01% |
VisNetic | 58 | 0.01% |
OpenSMTPD | 50 | 0.01% |
Mercury | 25 | 0.00% |
OpenVMS | 19 | 0.00% |
Interscan | 18 | 0.00% |
NetIQ MailMarshal | 16 | 0.00% |
WebSTAR V | 15 | 0.00% |
Neon Mail Server | 10 | 0.00% |
MessageWall | 7 | 0.00% |
WebSTAR | 5 | 0.00% |
ModusMail | 4 | 0.00% |
MAILsweeper | 2 | 0.00% |
Detailed Breakdown of Revisions on a Per-Server Basis |
 |
Exim (425,543 servers) |
 |
|
Version |
Number of Servers |
Percent |
4.82 | 188,513 | 44.30% |
4.80 | 90,794 | 21.34% |
4.80.1 | 87,045 | 20.46% |
4.72 | 13,539 | 3.18% |
4.76 | 13,074 | 3.07% |
4.69 | 10,780 | 2.53% |
4.77 | 8,334 | 1.96% |
Other | 13,464 | 3.16% |
Postfix (235,348 servers) |
 |
|
Version |
Number of Servers |
Percent |
Other | 235,348 | 100.00% |
Sendmail (77,485 servers) |
 |
|
Version |
Number of Servers |
Percent |
8.13.8 | 19,344 | 24.96% |
8.14.4 | 11,194 | 14.45% |
8.13.1 | 10,494 | 13.54% |
8.14.5 | 10,413 | 13.44% |
8.14.3 | 9,917 | 12.80% |
8.12.11.20060308 | 2,637 | 3.40% |
8.13.6.20060614 | 2,126 | 2.74% |
8.14.2 | 1,445 | 1.86% |
8.14.7 | 1,315 | 1.70% |
8.11.6 | 1,110 | 1.43% |
8.12.10 | 1,010 | 1.30% |
8.14.1 | 927 | 1.20% |
8.13.6 | 828 | 1.07% |
Other | 4,725 | 6.10% |
Microsoft (45,916 servers) |
 |
|
Version |
Number of Servers |
Percent |
6.0.3790.4675 | 36,753 | 80.04% |
6.0.3790.3959 | 4,255 | 9.27% |
7.5.7601.17514 | 1,686 | 3.67% |
6.0.3790.1830 | 1,141 | 2.48% |
Other | 2,081 | 4.53% |
MailEnable (24,027 servers) |
 |
|
Version |
Number of Servers |
Percent |
1.986-- | 2,961 | 12.32% |
6.5-- | 1,841 | 7.66% |
5.10-- | 1,370 | 5.70% |
4.26-- | 1,046 | 4.35% |
6.0-- | 954 | 3.97% |
7.06-- | 615 | 2.56% |
1.981-- | 570 | 2.37% |
7.50-- | 482 | 2.01% |
7.07-- | 476 | 1.98% |
7.0-- | 429 | 1.79% |
6.57-- | 379 | 1.58% |
6.70-- | 378 | 1.57% |
7.55-- | 372 | 1.55% |
7.53-- | 364 | 1.51% |
6.03-- | 362 | 1.51% |
8.00-- | 344 | 1.43% |
8.00--8.00 | 306 | 1.27% |
3.62-- | 301 | 1.25% |
1.983-- | 260 | 1.08% |
7.09-- | 251 | 1.04% |
5.51-- | 245 | 1.02% |
Other | 9,721 | 40.46% |
MDaemon (14,641 servers) |
 |
|
Version |
Number of Servers |
Percent |
13.6.1 | 1,314 | 8.97% |
13.6.0 | 1,239 | 8.46% |
11.0.3 | 1,030 | 7.04% |
11.0.0 | 869 | 5.94% |
13.0.4 | 837 | 5.72% |
13.5.2 | 753 | 5.14% |
13.0.5 | 748 | 5.11% |
10.0.0 | 470 | 3.21% |
13.5.1 | 467 | 3.19% |
12.5.6 | 449 | 3.07% |
13.0.3 | 423 | 2.89% |
10.1.2 | 362 | 2.47% |
10.1.1 | 320 | 2.19% |
13.0.2 | 279 | 1.91% |
12.5.4 | 276 | 1.89% |
9.6.1 | 267 | 1.82% |
9.6.6 | 258 | 1.76% |
10.1.0 | 256 | 1.75% |
9.6.2 | 183 | 1.25% |
9.5.2 | 154 | 1.05% |
10.0.2 | 152 | 1.04% |
Other | 3,535 | 24.14% |
IMail (4,152 servers) |
 |
|
Version |
Number of Servers |
Percent |
8.22 | 623 | 15.00% |
12.3.0.100 | 605 | 14.57% |
12.2.0.235 | 504 | 12.14% |
11.5 | 294 | 7.08% |
9.23 | 255 | 6.14% |
8.15 | 245 | 5.90% |
8.05 | 173 | 4.17% |
11.03 | 156 | 3.76% |
10.02 | 125 | 3.01% |
11.02 | 99 | 2.38% |
7.07 | 87 | 2.10% |
12.1.0.270 | 87 | 2.10% |
7.15 | 84 | 2.02% |
6.06 | 83 | 2.00% |
11.01 | 80 | 1.93% |
12.2.0.169 | 60 | 1.45% |
8.00 | 56 | 1.35% |
10.01 | 49 | 1.18% |
9.21 | 45 | 1.08% |
9.10 | 43 | 1.04% |
11.0 | 43 | 1.04% |
Other | 356 | 8.57% |
Lotus Domino (2,633 servers) |
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|
Version |
Number of Servers |
Percent |
8.5.3 | 439 | 16.67% |
8.5.3FP3 | 161 | 6.11% |
8.5.2 | 144 | 5.47% |
8.5.3FP2 | 131 | 4.98% |
8.5.3FP4 | 115 | 4.37% |
8.5.1 | 110 | 4.18% |
8.5.3FP5 | 98 | 3.72% |
7.0.2 | 96 | 3.65% |
8.5.2FP2 | 95 | 3.61% |
8.5 | 85 | 3.23% |
8.5.3FP1 | 80 | 3.04% |
8.5.2FP4 | 66 | 2.51% |
8.5.2FP3 | 66 | 2.51% |
7.0.3 | 59 | 2.24% |
7.0 | 50 | 1.90% |
6.5.1 | 45 | 1.71% |
8.5.1FP5 | 42 | 1.60% |
7.0.1 | 41 | 1.56% |
6.5.3 | 39 | 1.48% |
6.5.4 | 36 | 1.37% |
8.5.2FP1 | 36 | 1.37% |
8.5.3FP6 | 35 | 1.33% |
8.0.2 | 35 | 1.33% |
6.5.5 | 34 | 1.29% |
8.0.1 | 32 | 1.22% |
6.5 | 28 | 1.06% |
Other | 435 | 16.52% |
CommuniGate Pro (2,109 servers) |
 |
|
Version |
Number of Servers |
Percent |
5.1.16 | 193 | 9.15% |
6.0.7 | 174 | 8.25% |
6.0.5 | 89 | 4.22% |
4.1.8 | 79 | 3.75% |
5.2.20 | 66 | 3.13% |
5.4.10 | 52 | 2.47% |
5.3.15 | 49 | 2.32% |
6.0.8 | 47 | 2.23% |
4.2.10 | 47 | 2.23% |
5.3.13 | 47 | 2.23% |
5.4.8 | 45 | 2.13% |
5.4.6 | 44 | 2.09% |
6.0.6 | 41 | 1.94% |
5.2.19 | 41 | 1.94% |
5.2.16 | 38 | 1.80% |
5.1.12 | 38 | 1.80% |
5.4.1 | 34 | 1.61% |
6.0.1 | 34 | 1.61% |
5.2.3 | 33 | 1.56% |
5.0.14 | 32 | 1.52% |
5.4.4 | 32 | 1.52% |
5.4.5 | 31 | 1.47% |
6.0.4 | 29 | 1.38% |
5.4.0 | 27 | 1.28% |
5.2.14 | 24 | 1.14% |
5.4.11 | 23 | 1.09% |
5.4.7 | 23 | 1.09% |
Other | 697 | 33.05% |
WinWebMail (1,907 servers) |
 |
|
Version |
Number of Servers |
Percent |
3.8.1.3 | 346 | 18.14% |
3.8.0.1 | 203 | 10.64% |
3.7.6.1 | 179 | 9.39% |
3.8.6.1 | 161 | 8.44% |
3.8.5.1 | 147 | 7.71% |
3.8.1.5 | 134 | 7.03% |
3.8.1.1 | 131 | 6.87% |
3.7.3.1 | 105 | 5.51% |
3.7.7.3 | 99 | 5.19% |
3.8.2.1 | 79 | 4.14% |
3.7.1.1 | 64 | 3.36% |
3.7.5.1 | 40 | 2.10% |
3.8.3.1 | 40 | 2.10% |
3.8.3.3 | 30 | 1.57% |
3.9.0.1 | 28 | 1.47% |
3.6.3.1 | 25 | 1.31% |
3.7.0.3 | 21 | 1.10% |
Other | 75 | 3.93% |
XMail (1,400 servers) |
 |
|
Version |
Number of Servers |
Percent |
1.27 | 435 | 31.07% |
1.22 | 373 | 26.64% |
1.25 | 211 | 15.07% |
1.26 | 137 | 9.79% |
1.24 | 93 | 6.64% |
1.21 | 40 | 2.86% |
1.17 | 22 | 1.57% |
1.23 | 20 | 1.43% |
1.12 | 15 | 1.07% |
Other | 54 | 3.86% |
Qmail Toaster (1,062 servers) |
 |
|
Version |
Number of Servers |
Percent |
1.3 | 1,016 | 95.67% |
1.2 | 25 | 2.35% |
Other | 21 | 1.98% |
Kerio (884 servers) |
 |
|
Version |
Number of Servers |
Percent |
6.7.3 | 168 | 19.00% |
6.7.0 | 93 | 10.52% |
6.6.2 | 88 | 9.95% |
6.5.0 | 71 | 8.03% |
6.5.2 | 58 | 6.56% |
6.7.2 | 51 | 5.77% |
6.4.1 | 44 | 4.98% |
6.7.1 | 39 | 4.41% |
6.3.1 | 38 | 4.30% |
6.6.1 | 33 | 3.73% |
6.5.1 | 28 | 3.17% |
6.4.0 | 25 | 2.83% |
6.4.2 | 23 | 2.60% |
6.3.0 | 18 | 2.04% |
6.6.0 | 18 | 2.04% |
6.0.10 | 12 | 1.36% |
Other | 77 | 8.71% |
SurgeSMTP (765 servers) |
 |
|
Version |
Number of Servers |
Percent |
6.3c2-2 | 161 | 21.05% |
6.5a-1 | 137 | 17.91% |
6.4a-1 | 82 | 10.72% |
5.3h2-2 | 42 | 5.49% |
6.1c-1 | 36 | 4.71% |
5.2a-1 | 36 | 4.71% |
3.9e-1 | 31 | 4.05% |
3.8k4-4 | 16 | 2.09% |
6.0a5-5 | 16 | 2.09% |
4.0u4-4 | 14 | 1.83% |
3.9h-18 | 11 | 1.44% |
4.2d4-4 | 10 | 1.31% |
5.0e4-4 | 9 | 1.18% |
3.8i3-3 | 9 | 1.18% |
3.7b8-8 | 8 | 1.05% |
6.5b-35 | 8 | 1.05% |
Other | 139 | 18.17% |
Merak (688 servers) |
 |
|
Version |
Number of Servers |
Percent |
8.0.3 | 257 | 37.35% |
8.9.1 | 81 | 11.77% |
8.5.0 | 52 | 7.56% |
8.3.8 | 38 | 5.52% |
7.5.2 | 34 | 4.94% |
7.6.4 | 32 | 4.65% |
7.4.5 | 30 | 4.36% |
7.2.0 | 11 | 1.60% |
7.0.1 | 11 | 1.60% |
7.4.2 | 10 | 1.45% |
7.6.1 | 10 | 1.45% |
9.0.0 | 9 | 1.31% |
8.9.0 | 8 | 1.16% |
6.2.1 | 8 | 1.16% |
8.3.15 | 8 | 1.16% |
8.2.4 | 7 | 1.02% |
7.6.0 | 7 | 1.02% |
Other | 75 | 10.90% |
ArGoSoft (409 servers) |
 |
|
Version |
Number of Servers |
Percent |
1.8 (1.8.9.6) | 99 | 24.21% |
1.8 (1.8.9.3) | 60 | 14.67% |
1.8 (1.8.9.5) | 59 | 14.43% |
1.8 (1.8.9.1) | 51 | 12.47% |
1.8 (1.8.8.8) | 23 | 5.62% |
1.8 (1.8.8.7) | 19 | 4.65% |
1.8 (1.8.9.2) | 16 | 3.91% |
1.8 (1.8.9.4) | 11 | 2.69% |
1.8 (1.8.6.0) | 9 | 2.20% |
1.8 (1.8.8.1) | 6 | 1.47% |
1.8 (1.8.8.9) | 5 | 1.22% |
Other | 51 | 12.47% |
Post.Office (230 servers) |
 |
|
Version |
Number of Servers |
Percent |
3.5.3 | 28 | 12.17% |
4.1.2.4 | 25 | 10.87% |
4.1.0.2 | 17 | 7.39% |
4.2.2 | 16 | 6.96% |
4.0.1 | 13 | 5.65% |
4.1.1 | 13 | 5.65% |
3.5.3J | 11 | 4.78% |
4.2 | 10 | 4.35% |
3.9.2.3 | 9 | 3.91% |
4.1.0.3 | 7 | 3.04% |
4.1.0.4 | 7 | 3.04% |
3.1.2J | 6 | 2.61% |
3.1.2 | 4 | 1.74% |
3.5.4 | 4 | 1.74% |
3.9.2 | 4 | 1.74% |
3.9.1.2 | 4 | 1.74% |
4.1.2.3 | 4 | 1.74% |
4.2.1.3 | 4 | 1.74% |
3.8.3 | 4 | 1.74% |
3.5.1 | 4 | 1.74% |
3.9.1.3 | 3 | 1.30% |
3.9.2.1 | 3 | 1.30% |
3.8.7.4 | 3 | 1.30% |
3.9.2.2 | 3 | 1.30% |
3.9.1 | 3 | 1.30% |
Other | 21 | 9.13% |
GroupWise (225 servers) |
 |
|
Version |
Number of Servers |
Percent |
7.0.3 | 44 | 19.56% |
6.5.7 | 28 | 12.44% |
8.0.2 | 26 | 11.56% |
7.0.4 | 22 | 9.78% |
7.0.2 | 18 | 8.00% |
8.0.3 | 13 | 5.78% |
12.0.2 | 11 | 4.89% |
6.5.6 | 9 | 4.00% |
6.5.4 | 8 | 3.56% |
7.0.1 | 6 | 2.67% |
8.0.1 | 6 | 2.67% |
6.0.4 | 6 | 2.67% |
8.0.0 | 4 | 1.78% |
12.0.1 | 4 | 1.78% |
6.5.2 | 3 | 1.33% |
6.5.5 | 3 | 1.33% |
Other | 14 | 6.22% |
MagicMail (210 servers) |
 |
|
Version |
Number of Servers |
Percent |
Other | 210 | 100.00% |
Gordano Messaging Suite (GMS) (179 servers) |
 |
|
Version |
Number of Servers |
Percent |
Other | 179 | 100.00% |
Trend Micro (165 servers) |
 |
|
Version |
Number of Servers |
Percent |
5.7 | 72 | 43.64% |
5.18 | 31 | 18.79% |
5.5 | 30 | 18.18% |
7.0 | 11 | 6.67% |
7.1 | 9 | 5.45% |
8.5 | 3 | 1.82% |
x.x | 2 | 1.21% |
5.15 | 2 | 1.21% |
Other | 5 | 3.03% |
InterScan VirusWall (75 servers) |
 |
|
Version |
Number of Servers |
Percent |
Other | 75 | 100.00% |
Mirapoint (63 servers) |
 |
|
Version |
Number of Servers |
Percent |
4.4.3-GA | 8 | 12.70% |
4.3.5-GA | 7 | 11.11% |
4.2.3-GA | 7 | 11.11% |
4.3.6-GA | 6 | 9.52% |
3.10.10a-GA | 6 | 9.52% |
4.1.9-GA | 5 | 7.94% |
4.4.4-GA | 5 | 7.94% |
4.4.2a-FCS | 3 | 4.76% |
4.1.10-GA | 3 | 4.76% |
4.1.3-GA | 2 | 3.17% |
4.3.3-GA | 2 | 3.17% |
4.1.5-GA | 2 | 3.17% |
3.10.8-GA | 1 | 1.59% |
3.8.2-GA | 1 | 1.59% |
3.8.4-GA | 1 | 1.59% |
3.3.3-GR | 1 | 1.59% |
4.1.6-GA | 1 | 1.59% |
3.7.5a-GA | 1 | 1.59% |
4.3.7-GA | 1 | 1.59% |
Other | 0 | 0.00% |
VisNetic (58 servers) |
 |
|
Version |
Number of Servers |
Percent |
9.3.2.0 | 11 | 18.97% |
9.1.4.1 | 7 | 12.07% |
8.0.3.1 | 5 | 8.62% |
6.2.2.0 | 4 | 6.90% |
5.0.2.3 | 3 | 5.17% |
7.2.4.1 | 3 | 5.17% |
5.5.8.3 | 3 | 5.17% |
5.0.2.0 | 2 | 3.45% |
8.0.3 | 2 | 3.45% |
5.8.6.4 | 2 | 3.45% |
7.6.1.0 | 2 | 3.45% |
5.4.5.4 | 2 | 3.45% |
5.8.6.6 | 2 | 3.45% |
8.5.0.8 | 2 | 3.45% |
8.3.5.0 | 1 | 1.72% |
8.3.0.1 | 1 | 1.72% |
8.3.0.0 | 1 | 1.72% |
8.5.0.5 | 1 | 1.72% |
9.1.4.0 | 1 | 1.72% |
8.0.3.0 | 1 | 1.72% |
9.1.4.1 da-lax-msg mail.davidco.com | 1 | 1.72% |
6.0.9.0 | 1 | 1.72% |
Other | 0 | 0.00% |
OpenSMTPD (50 servers) |
 |
|
Version |
Number of Servers |
Percent |
Other | 50 | 100.00% |
Mercury (25 servers) |
 |
|
Version |
Number of Servers |
Percent |
1.48 | 12 | 48.00% |
3.32 | 10 | 40.00% |
3.21 | 1 | 4.00% |
4.x | 1 | 4.00% |
3.21c | 1 | 4.00% |
Other | 0 | 0.00% |
OpenVMS (19 servers) |
 |
|
Version |
Number of Servers |
Percent |
8.4 | 7 | 36.84% |
8.3 | 7 | 36.84% |
7.3 | 4 | 21.05% |
8.2 | 1 | 5.26% |
Other | 0 | 0.00% |
Interscan (18 servers) |
 |
|
Version |
Number of Servers |
Percent |
3.81-Build_1022 | 4 | 22.22% |
3.55 (build 1016) | 3 | 16.67% |
3.8-Build_3013 | 2 | 11.11% |
3.55 (build 1029) | 2 | 11.11% |
3.81-Build_1084 | 1 | 5.56% |
3.5 (build 1294) | 1 | 5.56% |
3.53 (build 2011) | 1 | 5.56% |
3.55 (build 1020) | 1 | 5.56% |
3.53 (build 2013) | 1 | 5.56% |
3.53 (build 2017) | 1 | 5.56% |
3.53 (build 1493) | 1 | 5.56% |
Other | 0 | 0.00% |
NetIQ MailMarshal (16 servers) |
 |
|
Version |
Number of Servers |
Percent |
6.0.3.8 | 9 | 56.25% |
5.5.6.5 | 2 | 12.50% |
5.5.6.6 | 2 | 12.50% |
5.5.5.6 | 1 | 6.25% |
5.5.4.17 | 1 | 6.25% |
5.5.6.7 | 1 | 6.25% |
Other | 0 | 0.00% |
WebSTAR V (15 servers) |
 |
|
Version |
Number of Servers |
Percent |
5.4.1 | 8 | 53.33% |
5.4.0 | 3 | 20.00% |
5.3.2 | 2 | 13.33% |
5.3.3 | 1 | 6.67% |
5.3.4 | 1 | 6.67% |
Other | 0 | 0.00% |
Neon Mail Server (10 servers) |
 |
|
Version |
Number of Servers |
Percent |
3.0.7 | 3 | 30.00% |
3.1.4 | 2 | 20.00% |
3.1.2 | 2 | 20.00% |
3.1.3 | 1 | 10.00% |
3.1.0 | 1 | 10.00% |
3.0.8 | 1 | 10.00% |
Other | 0 | 0.00% |
MessageWall (7 servers) |
 |
|
Version |
Number of Servers |
Percent |
1.0.8 | 6 | 85.71% |
1.0.6 | 1 | 14.29% |
Other | 0 | 0.00% |
WebSTAR (5 servers) |
 |
|
Version |
Number of Servers |
Percent |
Other | 5 | 100.00% |
ModusMail (4 servers) |
 |
|
Version |
Number of Servers |
Percent |
4.35.477.0 | 2 | 50.00% |
4.1.361.21 | 1 | 25.00% |
3.2.315.0 | 1 | 25.00% |
Other | 0 | 0.00% |
MAILsweeper (2 servers) |
 |
|
Version |
Number of Servers |
Percent |
4.3.17.0 | 2 | 100.00% |
Other | 0 | 0.00% |