Newsletter operators need a clear path from publishing-platform setup to domain-level DMARC review. Use this checklist to verify SPF, DKIM, and alignment without treating DNS as a shortcut around reputation, permission, or recipient expectations.
Scan your newsletter domain
Check public authentication records before changing a newsletter platform, custom domain, or DMARC policy.
01$0Free scan
Check the public sender-auth records mailbox providers expect.
02$0Shareable action plan
Keep one URL with evidence, owner steps, and decisions.
03$49$49 fix plan
Add human review, provider context, and verification steps.
Optional. Most first scans can run with just the domain.
Checks Gmail, Yahoo, and Microsoft sender requirementsPublic DNS onlyNo mailbox login needed
Example result72/100Needs attention
Review DMARC policy strength before a high-volume send.
Public DNS evidence
DMARC/SPF/DKIM status and caveats are visible before you pay.
Owner-ready next step
The audit adds provider context and a verification checklist.
Get the exact fix plan for your domain.$49 readiness audit: prioritized owner actions, DNS evidence, and verification checks.
A creator may start with a platform-hosted address, later add a custom domain, then connect sponsors, automations, community messages, or a CRM. DNS can look correct in one product screen while the full domain sender inventory is still incomplete.
Authentication should answer three questions: who sends for the domain, which messages align with the visible From domain, and which failures are expected versus suspicious.
Newsletter authentication checklist
Identify the publishing platform: Document whether the newsletter is sent from beehiiv, Substack, Ghost, Mailchimp, Kit, Buttondown, Customer.io, or another platform. Each provider may use different DNS records, DKIM selectors, bounce domains, and custom domain checks.
Confirm the visible From domain: DMARC evaluates alignment with the domain readers see in the From address. If the platform sends with its own bounce or signing domain, check whether SPF or DKIM aligns with your newsletter domain.
Review SPF as a shared limit: Newsletter tools often ask for SPF includes, but the root domain may already include workspace mail, CRM tools, or product mail. Keep one intentional SPF policy and avoid piling snippets into DNS without checking the full record.
Verify DKIM with real messages: Publishing a DKIM record is only half the check. Send a test issue or preview to a mailbox you control and inspect headers so the expected domain signs the message.
Monitor before policy changes: Use DMARC reporting to see newsletter, workspace, transactional, and community-platform traffic together. Move toward quarantine or reject only after legitimate sources are accounted for.
Best-practice review path
Scan the newsletter domain, compare it with the provider setup status, then send a test message and inspect headers. If the same domain is used for Google Workspace, Microsoft 365, support tools, or product notifications, include those systems in the DMARC review before changing policy.
Keep this diagnostic: a clean public record is useful, but it is only one part of a healthy newsletter operation.
Newsletter authentication FAQ
Can a newsletter platform handle authentication for me?
A platform can provide DNS values and signing controls, but the domain owner still needs to verify public DNS, alignment, and how the newsletter fits with other senders on the same domain.
Is sender authentication the same as list permission?
No. Authentication is a technical identity signal. List permission, unsubscribe handling, complaints, message quality, and sending patterns are separate operational concerns.
Should a newsletter use a separate subdomain?
Often it is worth considering, especially when the root domain also sends workspace or product mail. A subdomain can make reporting and policy review cleaner, but it still needs its own authentication checks.
Need a readable domain review?
SenderReady readiness audits translate public DNS checks into cautious next steps for newsletter domains. The report path starts from the scanner and pricing waitlist.