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

I don't have time currently to research/confirm others, but there are
many high profile and medium to high volume mail sites in the US running
Postfix both at the edge and internally.  Though the fact that AOL
alone, which handles millions of emails per day, is using Postfix should
provide ample backing to your proposal to use Postfix.  These above are
simply icing on the cake.

-- 
Stan

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