Free email deliverability check
Find out if your business email is trusted — before customers disappear.
Enter your domain and check the records inbox providers read before they trust your mail: SPF, DKIM, and DMARC. Real DNS checks against your live setup, no signup required.
- Real DNS checks
- No signup to run it
- Plain-English results
Why this tool exists
A missed email is a missed customer.
When a quote, invoice, or lead reply lands in spam, you usually don't get a warning. You just get silence.
Your domain needs proof.
Inbox providers want proof that the server sending mail is allowed to send for your domain.
Your messages need signatures.
DKIM helps prove the email wasn't changed between sender and receiver.
Your policy matters.
DMARC tells receiving providers what to do when a message fails authentication.
Your reputation compounds.
A clean setup protects the domain your day-to-day business email depends on.
What we check
The records inbox providers actually read.
Since 2024, major inbox providers have tightened authentication expectations. This checker explains the important pieces in plain English.
- SPF
Who is allowed to send?
Checks whether your domain declares the services allowed to send mail for it — and whether the record is valid.
- DKIM
Was the message signed?
Checks whether your outbound mail can be cryptographically signed so providers can verify it came from you.
- DMARC
What happens when mail fails?
Checks whether your domain has a policy that ties SPF and DKIM together and protects against spoofing.
- Inbox readiness
Is the stack trustworthy?
Turns the authentication setup into a plain-English grade so the next step is obvious.
How the fix works
DNS deliverability work should be careful, staged, and documented.
Good setup isn't just “paste this record.” The right process identifies who sends mail for the domain, fixes broken records, and avoids blocking legitimate messages.
Request a review- 1. Identify every senderWebsite forms, Google Workspace, Microsoft 365, CRMs, newsletter tools, invoice systems, and automation platforms.
- 2. Clean up DNSFix SPF includes, validate DKIM, add DMARC, and remove outdated or duplicate records.
- 3. Start with visibilityUse reports and monitoring before moving DMARC into stronger enforcement.
- 4. Protect the root domainSeparate bulk mail from the business domain that handles quotes, invoices, and customer replies.
Questions
Email deliverability, answered plainly.
What does this checker actually look at?
It runs real DNS lookups against your domain and reports on SPF, DKIM, and DMARC — and whether the domain appears set up to send trusted email. It reads your live setup; no mock data.
Why is my email going to spam if it isn't spam?
Usually because the receiving provider can't verify who sent it, or because the sending domain has weak authentication or reputation signals. Clean SPF, DKIM, and DMARC are how you prove you're trustworthy.
Do small businesses need all three records?
Yes. SPF, DKIM, and DMARC work together, and since 2024 the major providers expect them. The more your business relies on email, the less optional they become.
What happens after the check?
You see a grade and which areas have issues. If you'd rather not untangle DNS records yourself, request a review and Lightly Coded will fix it — so your email actually reaches the people you send it to.
Get it fixed
Found issues? We'll fix them for you.
Deliverability problems live in a handful of DNS records — set up correctly, once. Request a review and get your domain landing in the inbox.