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From: Victor Duchovni (Victor.Duchovnimorganstanley.com)
Date: Tue Apr 27 2010 - 11:24:35 CDT
On Tue, Apr 27, 2010 at 11:19:23AM -0400, N. Yaakov Ziskind wrote:
> Victor Duchovni wrote (on Thu, Apr 22, 2010 at 01:28:24AM -0400):
> > Also, at this point, with Postfix driving such a large share of the
> > Internet email infrastructure,
> Can you, please, elucidate on this? Some numbers, perhaps, or a list of
> Fortune XX companies that use it? It would be useful in selling the
I think just AOL alone is sufficient to make the point. Surveys are very
difficult to conduct in this space. Here's an informal sample: in 880924
messages received from remote systems yesterday, the following (identifiable)
MTA frequencies were observed in the top-most remote Received header:
$ < /tmp/data pcregrep -c .
$ < /tmp/data pcregrep -c Postfix
$ < /tmp/data pcregrep -c '\(8\.|8\.\S+/8\.|Sendmail|Switch-'
$ < /tmp/data pcregrep -c Microsoft
$ < /tmp/data pcregrep -c qmail
$ < /tmp/data pcregrep -c ecelerity
$ < /tmp/data pcregrep -c pcregrep -c PowerMTA
$ < /tmp/data pcregrep -c Exim
The total number of identified MTAs was ~487,000, so unless you can
guess at another MTA that accounts for a larger share in the remaining
less than half of the sample, Posffix is at number 1. Note that some
systems hide the fact that they are Postfix and are not counted, for
example "Zixconect" a provider of border email encryption for businesses
emits, headers with:
Received: from ZIX05.STRONGPORT.COM (ZixVPM [127.0.0.1]) by Outbound.strongport.com (Proprietary) with ESMTP id 67081E89CE
which are clearly Postfix, but were not counted. This was just 1500 of
the messages, but all it takes a vendor using a different "mail_name"
in a repackaged Postfix, and I need a much more complex pattern matcher
than I was willing to assemble on the spot.
P.S. Morgan Stanley is looking for a New York City based, Senior Unix
system/email administrator to architect and sustain our perimeter email
environment. If you are interested, please drop me a note.