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.

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...

dmarcspfdkimmicrosoft 365