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Emerging & Advanced Topics

A guide to SPF, your first declaration of identity. This section explains how to create the DNS record that lists all IP addresses authorized to send for your domain. It's the "approved crew list" you give to every harbor master.

7 questions in this topic

What is Authenticated Replies (ARF enhancements)? How will BIMI v2 or Brand-Trust standards evolve? What is SMTP UTF8 and does it affect authentication? How do authentication failures affect DMARC aggregate scores? What is ARC-Seal key rotation? Could AI/ML be used to evaluate authentication trustworthiness? What authentication requirements exist for 2024-25 bulk sender rules (Gmail/Yahoo)?