Mail Server Survey March 2004  

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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%

 

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:

CMailServer: http://www.computalynx.net/
CommuniGate Pro: http://www.stalker.com/
DynFX: http://www.dynfx.de/
Exim: http://www.exim.org/
GroupWise: http://www.novell.com/
IMail: http://www.ipswitch.com/
InterScan: http://www.trendmicro.com/
Kerio MailServer: http://www.kerio.com/
Lotus Domino: http://www.lotus.com/
MailEnable: http://www.mailenable.com/
MDaemon: http://www.altn.com/
Merak: http://www.merakmailserver.com/
MERCUR: http://www.atrium-software.com/
Microsoft ESMTP MAIL Service: http://www.microsoft.com/
Microsoft Exchange: http://www.microsoft.com/
Netscape Messaging Server: http://wp.netscape.com/messaging/v3.5/
NTMail: http://www.ntmail.co.uk/
Postfix: http://www.postfix.org/
QMail: http://www.qmail.org/
Sendmail: http://www.sendmail.org/
WinRoute Pro: http://www.kerio.com/
XMail: http://www.xmailserver.org/

 

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