If you're using GreyListing, know that a given email will not be coming from the same IP address twice.
The outgoing IP address is randomized for ... reasons. This is the same for both our Enterprise as well as Consumer offerings. 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 <mailop-boun...@mailop.org> On Behalf Of Benny Pedersen via mailop Sent: Sunday, June 18, 2023 11:06 AM To: mailop@mailop.org Subject: [EXTERNAL] Re: [mailop] Strange mail delivery from microsoft Klaus Ethgen via mailop skrev den 2023-06-18 18:53: > I have tighten my firewall a bit and seen many attacks from Microsoft > (40.92.0.0/16). They contact once from a IP and then never again. If I > greylist them, the will try to deliver from a different address which > gets greylisted again and so on. use greylist /32 for ipv4, and /64 for ipv6, with microsoft there is no ipv6 senders maybe change greylist time to one single hour aswell, so urls is listed at accept time > Could you please tell me how to handle that broken mail delivery? It > triggers all, my mailserver attack filter as well as greylisting. change greylist to /32 for ipv4, i cant think of a better way to help microsoft servers :) > Unfortunately I have some contacts on hotmail. Otherwise I would not > care about. not news for me _______________________________________________ mailop mailing list mailop@mailop.org<mailto:mailop@mailop.org> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist.mailop.org%2Flistinfo%2Fmailop&data=05%7C01%7Cmichael.wise%40microsoft.com%7C376b1a41f51d4eb788c308db70270b0b%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C638227085351365846%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=wERsfUyDMpMUUp2hBUv3MTcb2ekXd9xj5RK8ZGsBeJo%3D&reserved=0<https://list.mailop.org/listinfo/mailop>
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