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<< Mail Server Surveys Index
Method:
- Scanning: Scanning is done on an IP basis, i.e., I do not scan
domains/fully qualified domains (FQDN), but IP addresses. By doing
so I avoid to scan the same IP address twice or more because of
multiple domains that share the same IP address.
- I try to focus on subnets of hosting companies that offer dedicated
servers to their customers. Usually these dedicated servers come
with only one IP address so the percentage of mail servers spreading
across multiple IP addresses is low.
- Results: I try to list the most popular mail servers in the
results table. Other mail servers with a minor role are merged
under "Unknown / Other". "Unknown / Other"
also contains the mail servers that do not tell what software
they are running. Thus, it is possible that (e.g.) a mail server
running Postfix is listed under "Unknown / Other" because
it does not tell that it is running Postfix.
In this survey I mainly scanned subnets that are allocated to Germany,
but also from some other European countries as well as the U.S.A.
I will try to extend future surveys to other countries as well.
Results:
| Mail Server |
Quantity |
Percentage |
| CMailServer |
2 |
0.00% |
| CommuniGate Pro |
104 |
0.10% |
| DynFX |
135 |
0.13% |
| Exim |
6,311 |
5.94% |
| GroupWise |
31 |
0.03% |
| IMail |
19,928 |
18.75% |
| InterScan |
65 |
0.06% |
| Kerio MailServer |
26 |
0.02% |
| Lotus Domino |
278 |
0.26% |
| MailEnable |
245 |
0.23% |
| MDaemon |
366 |
0.34% |
| Merak |
452 |
0.43% |
| MERCUR |
346 |
0.33% |
| Microsoft ESMTP MAIL Service |
2,252 |
2.12% |
| Microsoft Exchange |
103 |
0.10% |
| Netscape Messaging Server |
1 |
0.00% |
| NTMail |
235 |
0.22% |
| Postfix |
21,834 |
20.55% |
| QMail |
37 |
0.03% |
| Sendmail |
30,755 |
28.94% |
| WinRoute Pro |
5 |
0.00% |
| XMail |
241 |
0.23% |
| Unknown / Other |
22,517 |
21.19% |
| Total: |
106,269 |
100.00% |
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Conclusion:
The big share of IMail is interesting, if not unexpected. From
the data I gathered I could see though that IMail is mainly used
in two subnets and plays a minor role in all other subnets. Without
those two subnets the result would look a little bit different.
I will try to track the IMail development in future surveys.
The success of the well-known mail servers Sendmail, Postfix and
Exim does not come as a surprise, and in contrast to IMail these
mail servers spread across nearly all subnets so it cannot be explained
with a single hosting company using a specific mail server on all
systems.
If you do not consider the "Unknown / Other" share Sendmail,
Postfix and Exim make up for over 70% of the mail servers in this
survey. As these servers are usually running under a *nix-like operating
system (Unix, Linux, FreeBSD, Solaris, etc.) it shows the power
of *nix-like operating systems in the mail server market.
Links:
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