B BROCENT

Email Deliverability

Cover image for Brocent IT blog post: How to Use Claude to Diagnose and Fix SPF, DKIM and DMARC When Your Business Email Goes Missing

October 05, 2026 | 12 min

How to Use Claude to Diagnose and Fix SPF, DKIM and DMARC When Your Business Email Goes Missing

A practical guide to using Claude to read DMARC aggregate reports and diagnose why a helpdesk, invoicing or newsletter sender fails SPF, DKIM and alignment on Microsoft 365, with the 10-lookup SPF limit, a staged DMARC policy path and what never to paste into an AI.