--On Tuesday, January 31, 2006 10:54 -0500 [EMAIL PROTECTED] wrote:

But wouldn't it be in Microsoft's best interest to prevent their servers
from being used to spam?


Tangent inspired by the above question:

Consider this host, which sends mail from Microsoft employees:

Received: from smtphost1.microsoft.com ([131.107.3.116])
       by mx.gmail.com with ESMTP id 8si3854684wrl.2006.01.27.18.04.33;
       Fri, 27 Jan 2006 18:04:33 -0800 (PST)


No reverse DNS.
HELO smtphost1.microsoft.com, but that's the name of 131.107.1.101.
So, it looks like scam mail supposedly from Microsoft.

But 131.107.3.116 is in their _spf-a.microsoft.com SPF record.  Oh, I
get it.  We use SPF or our filter misfires.  Pretty risky stance for
them to take with their own employees' mail.


Joseph Brennan
Columbia University Information Technology


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