On Tue, Dec 30, 2025 at 12:38:48AM +0000, Graeme Fowler (Admin) via mailop wrote:
> The problem I have is that I simply can't reach the link they provide in the > error message: > > *Diagnostic-Code*: smtp; 550 5.7.1 Unfortunately, messages from > [91.132.147.157] weren't sent. Please contact your Internet service > provider since part of their network is on our block list (S3150). You > can also refer your provider to > http://mail.live.com/mail/troubleshooting.aspx#errors. [Name=Protocol > Filter Agent][AGT=PFA][MxId=11BC88DCCD3A3675] > [BN3PEPF0000B06E.namprd21.prod.outlook.com 2025-12-29T08:43:13.886Z > 08DE446E687E5366] That page redirected me to: https://substrate.office.com/ip-domain-management-snds/postmaster/troubleshooting#errors Content attached as a rich text document "with attachment" (.rtfd), in the form of a tarball (the attachment is a small PNG with the Microsoft logo). -- Viktor. 🇺🇦 Слава Україні!
ms.tgz
Description: application/gzip
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