Learn about DMARC, SPF, and DKIM

Welcome to DMARCPal's Learn blog. Check our posts to discover and learn more about DMARC, SPF, DKIM, and how to get the most value of your DMARCPal subscription.

Deliverability after DMARC: reputation and feedback loops (Google Postmaster Tools, Microsoft SNDS, complaint signals)

Publishing DMARC is an important milestone, but it is not the finish line for deliverability.

After SPF, DKIM, and DMARC are in place, mailbox providers still make inbox and spam decisions based on sender reputation, user complaints, list quality, traffic consistency, and overall message quality.

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Microsoft 365 custom domains and .onmicrosoft.com: what SPF, DKIM, and DMARC to publish

Microsoft 365 email authentication gets confusing faster than it should, mostly because every tenant has at least two domain stories happening at once:

  • your real public domain, like example.com
  • the tenant's built-in .onmicrosoft.com domain

And those two do not behave the same way.

T...

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