Zitat von Stan Hoeppner <s...@hardwarefreak.com>:

On 7/14/2011 6:58 AM, Peter Tselios wrote:
Hallo,
I need to prepare a presentation for my company because we plan to deploy a new mail system. I need to know the names of some medium to large ISPs that uses Postfix as their SMTP server. Do you know where I can find that information?

It may be worth noting that the open source Zimbra integrated messaging
suite uses Postfix as its MTA component.

Some noteworthy Postfix using sites in the USA:

1.  Stanford University's 4 MX hosts run Postfix
    http://www.stanford.edu
    One of the leading research universities in US
    Cisco Systems powers the internet and was born at Stanford:
    http://www.stanford.edu/group/wellspring/cisco_spotlight.html
    Current enrollment 19,535
    Graduate students  12,595
    mx2.stanford.edu.       1800    IN      A       171.67.219.72
    mx3.stanford.edu.       1800    IN      A       171.67.219.73
    mx4.stanford.edu.       1800    IN      A       171.67.219.74
    mx1.stanford.edu.       1800    IN      A       171.67.219.71

2.  NASA's 6 MX hosts run Postfix
    http://www.nasa.gov
    ndmsnpf02.ndc.nasa.gov. 600     IN      A       198.117.0.122
    ndjsnpf03.ndc.nasa.gov. 600     IN      A       198.117.1.123
    ndjsnpf01.ndc.nasa.gov. 600     IN      A       198.117.1.121
    ndmsnpf03.ndc.nasa.gov. 600     IN      A       198.117.0.123
    ndmsnpf01.ndc.nasa.gov. 600     IN      A       198.117.0.121
    ndjsnpf02.ndc.nasa.gov. 600     IN      A       198.117.1.122


At least one of the big player in computer market is also using Postfix:

goog@web:~# telnet smtp.hp.com 25
Trying 15.193.32.72...
Connected to smtp.hp.com.
Escape character is '^]'.
220 g6t0181.atlanta.hp.com ESMTP Postfix
EHLO kwsoft.de
250-g6t0181.atlanta.hp.com
250-PIPELINING
250-SIZE
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
help
502 5.5.2 Error: command not recognized
quit
221 2.0.0 Bye
Connection closed by foreign host.
goog@web:~#

It should be obvious by now that many organisations around the world which value e-mail are using Postfix.

Regards

Andreas

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