Are they listed in the relevant SPF record?
Aloha, Michael. -- Michael J Wise Microsoft Corporation| Spam Analysis "Your Spam Specimen Has Been Processed." Open a ticket for Hotmail<http://go.microsoft.com/fwlink/?LinkID=614866> ? -----Original Message----- From: mailop <[email protected]> On Behalf Of Michael Peddemors via mailop Sent: Tuesday, December 16, 2025 11:53 AM To: [email protected] Subject: [EXTERNAL] [mailop] Microsoft, can you shed light on this?? Outlook Live clients and account discovery.. 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? -- "Catch the Magic of Linux..." ------------------------------------------------------------------------ Michael Peddemors, President/CEO LinuxMagic Inc. Visit us at https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.linuxmagic.com%2F&data=05%7C02%7Cmichael.wise%40microsoft.com%7Cabfe0bb64bad48242a3908de3cdd1389%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C639015117391446267%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=haWq1CA%2F0%2BhMpbCJg7%2BuAojLUGG%2Biuq8wUv54U6eRfI%3D&reserved=0<http://www.linuxmagic.com/> @linuxmagic A Wizard IT Company - For More Info https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.wizard.ca%2F&data=05%7C02%7Cmichael.wise%40microsoft.com%7Cabfe0bb64bad48242a3908de3cdd1389%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C639015117391478287%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=08MyUMfylbZpIuxBMmjcOeJ4xOxIM6RMcQnb085wGbQ%3D&reserved=0<http://www.wizard.ca/> "LinuxMagic" a Reg. TradeMark of Wizard Tower TechnoServices Ltd. ------------------------------------------------------------------------ 604-682-0300 Beautiful British Columbia, Canada _______________________________________________ mailop mailing list [email protected]<mailto:[email protected]> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist.mailop.org%2Flistinfo%2Fmailop&data=05%7C02%7Cmichael.wise%40microsoft.com%7Cabfe0bb64bad48242a3908de3cdd1389%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C639015117391499316%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=5O3LPC2n8DYq%2FIAs957aZ7Oy7CrIYtv4yXhaWEJwAEU%3D&reserved=0<https://list.mailop.org/listinfo/mailop>
_______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
