Microsoft is making it REALLY hard to determine legitimate attempts at authentication, or authentication discovery, as the IPs they use have NO differentiators from bad IPs on their networks.

The following appear to be:
(even though they are being part of the new Outlook email client
routing system):

40.99.85.29 (MY)
52.98.116.53 (SG)
40.99.104.101 (KR)
40.99.53.37 (JP)
52.98.49.141 (MY)
40.99.32.173 (JP)

they are reported to be coming from various remote countries based on
the various GeoIP DB and are being blocked by the country auth.

There is no consistency, and even from official MS Outlook IPs, we no longer even have PTR's on them.

Another company wanting to make it difficult to run your own email servers..

Can we get a little more transparency on which IPs are actually part of the MS routing for Outlook authentication/discovery IPs?

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Visit us at http://www.linuxmagic.com @linuxmagic
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