Скачать или смотреть 🔐 ARC explained simply: the key to saving SPF/DKIM/DMARC during forwarding (2025)

🔐 ARC (Authenticated Received Chain) has become a critical component of modern email authentication — especially now that Gmail, Yahoo, and Microsoft enforce stricter policies against misaligned forwarded emails.

In this video, I clearly explain:
• Why SPF, DKIM and DMARC fail when an email is forwarded
• The exact role of the three ARC headers: AAR, AMS, AS
• How ARC rebuilds a verifiable trust chain even after message modification
• Why mailbox providers now require ARC to avoid “SPF/DKIM misaligned forwarded mail”
• Real-world scenarios: mailing lists, redirections, M365, OVH, Google Workspace…
• How ARC protects your deliverability, authentication rate, and DMARC alignment

⚙️ You will also learn:
• How to configure ARC on Postfix, Exim, Microsoft, Google
• Common issues: ARC invalid, chain breaks, AMS failures
• Why ARC has become mandatory in 2025 for any serious domain

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