On 04/20/2015 08:04 PM, Dianne Skoll wrote:
Hi,

Not sure if this is still an issue in 3.4, but I'm seeing tons of
FPs on RCVD_ILLEGAL_IP.  Why?  Because Microsoft (damn it to hell)
has started using RESERVED IP ranges internally!  Have a look:

Received: from BLUPR10MB0835.namprd10.prod.outlook.com (0.163.216.13)
          by BLUPR10MB0835.namprd10.prod.outlook.com (0.163.216.13)
          with Microsoft SMTP Server (TLS) id 15.1.136.25;
          Mon, 20 Apr 2015 17:43:48 +0000

Is anyone else seeing a sudden uptick in RCVD_ILLEGAL_IP FPs?

There is an ongoing discussion about this with MS, thru backchannels.

They're intentionally using the 0/8 to mask internal IPs.
A very VERY bad choice and they have been advised that not only SA thinks it's a bad idea.

Axb




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