Suped·4h agoMicrosoft 365 outage on November 12: Verify Exchange Online recoveryExchange Online recovery requires separate checks for mailbox access, queued messages, and email authentication.A response icon1A response icon1
joho no todai·6d agoOutlook.com Rejects Email With 550 5.7.1 as Senders Report Failures Across Multiple ServicesSenders are reporting authentication-related rejections for messages to Outlook.com and Hotmail, including mail sent through Microsoft 365…
Suped·Oct 24CampusGroups DMARC setup: SPF, DKIM, and sender alignmentCampusGroups email authentication starts with an approved sender, campus-specific DNS, and a message that proves alignment.A response icon1A response icon1
Suped·Oct 9DMARC enforcement: Why legitimate emails get blocked beyond p=noneDMARC alignment checks for legitimate senders, indirect mail, and policy changes.A response icon1A response icon1
Suped·Oct 3Antino phishing: Why SPF pass did not protect the visible senderRead the authenticated domain, investigate the attachment lure, and enforce DMARC with evidence from legitimate mail.A response icon1A response icon1
Josepollman·Sep 20The Fraud Email That Was Not ForgedRevolut says someone used a real government agency’s email domain to ask for customer data. I build a tool that reads email authentication…
Suped·Sep 18OAuth token security: What IETF draft 06 proposes for native email clientsOAuth destination checks and DPoP limits give mail operators a focused lab review, without a production migration deadline.A response icon1A response icon1
Suped·Sep 14DMARC np and DNSSEC: Why nonexistent subdomains can escape policyDMARC np policy depends on the receiver’s DNS interpretation. Keep DNSSEC, test denial responses, and close unsafe subdomain policy gaps.A response icon1A response icon1
Umer Ali·Sep 9SPF, DKIM, and DMARC: How Email Authentication Actually WorksEmail was never designed with authentication in mind. SMTP, the protocol that moves mail around the internet, will happily let anyone claim…A response icon1A response icon1
Suped·Sep 6Invisible Unicode tags in phishing: How defenders should normalize email textMicrosoft observed U+E0020 splitting finance lure words at scale. Here is how to normalize content without weakening SPF, DKIM, or DMARC.A response icon1A response icon1
