Field notes / Email & DNS

Understand it.
Then improve it.

Clear explanations and careful next steps for the configuration behind your email and domain.

DMARC, without the jargon

Understand policy, alignment and reports before changing how your domain handles unauthenticated email.

Learn how authorized senders, includes and the DNS lookup limit affect your email configuration.

Find your selector, check its public key, and understand what a DNS lookup can and cannot prove.

A practical sequence for missing records, duplicate policies and unexpected authentication failures.

Resolve duplicate policies and missing senders without accidentally removing legitimate email services.

Plan authentication for Microsoft 365 alongside the other services that send mail for your business.

Connect Workspace signing, SPF alignment and a deliberate DMARC rollout for your custom domain.

Understand where to add the policy when Cloudflare hosts your authoritative DNS.

Add the right TXT policy at the active DNS host and confirm it with a public lookup.