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What Mail Server Do The Fortune 100 Companies Use?

Started by Daniel Miessler · 7 months ago

Ever wonder what mail servers the top U.S. companies run? I found myself wondering what the top universities used a while back, and I just recently got curious as to what the Fortune 100 companies used as well.

The results were quite interesting; it’s always fun to see what so ... Continue reading »

4 comments

  • Very interesting Daniel. I just found your blog, and really enjoy it. We cover many of the same topics. I added you to my blogroll too so I won't forget you. :)
  • Heh. Who can resist customizing their Postfix banner. I'd forgotten mine...still like it.

    220 mail.icantfocus.com ESMTP Postfix (Trained Shaved Monkeys)
  • Looking at banners doesn't answer your original question.

    These responses:
    220 ******00*******************************************0****0****0 **********************200**22****20 *0*00
    Are typical of PIX. There's many others in the results file that don't identify a particular mail server.

    Aside from that, to find out what they actually use, you should have sent an email that would bounce (or generate a reply of any sort), then examine the headers. Or, use a search engine to find postings to some mailing list from someone at the company in question and do the same thing.
  • Agreed, Steve, but I wasn't trying to *really* enumerate what they were using; the test was really more along the lines of "Fortune 100 SMTP Banners", but I didn't have the presence of mind to name it that at the time. :)

    Thanks for the note...

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