We ran into persistent Microsoft SPF=Fail bounces that survived a complete SPF record overhaul. DKIM pass, DMARC pass, IPs covered. Seven months, 25,000+ bounces per day across seven domains. Root cause: a forgotten spf2.0/pra record. We documented the full investigation and the data. https://www.engagor.ai/resources/blog/microsoft-spf2-pra-evaluated-2026 Has anyone else run into this, i'm interested in seeing more data on this?
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