1
Publish an SPF record
List the services allowed to send for the domain, ending in -all or ~all. Keep it to one SPF record.
DNS and email
SPF, DKIM and DMARC checker
Look up the email authentication records on a domain.
Sample result All present
moveinsights.co.uk
Email authentication
SPF Found
DKIM Found
DMARC Found
Your result
What this checks
The three records inboxes trust
SPF, DKIM and DMARC are DNS records that prove an email really came from the domain it claims to. Together they decide whether a message lands in the inbox, the spam folder or nowhere.
This tool looks up the records straight from DNS in your browser using DNS-over-HTTPS, so there is nothing to install and no server in the middle.
Why it matters
Reach the inbox, not the spam folder
Without these records, a client newsletters and transactional emails are more likely to be filtered as spam, and the domain is easier to spoof.
Mail providers have tightened the rules, so a missing or broken DMARC policy now actively hurts deliverability.
How to fix it
Publish all three records
2
Set up DKIM
Add the signing key your mail provider gives you, so messages are cryptographically signed.
3
Add a DMARC policy
Start with p=none to monitor, then move to quarantine or reject once SPF and DKIM align.
One of around two dozen checks
SPF, DKIM and DMARC checker is one check
Janitor watches email deliverability (SPF, DKIM, DMARC) automatically across every client site and puts it in a branded report you can send.
Keep reading
Related tools and guides
FAQ
SPF, DKIM and DMARC checker FAQ
How does this look up the records?
It queries public DNS directly from your browser using DNS-over-HTTPS. Nothing is sent to our servers, and there is no sign-up.
Why can the tool not find my DKIM record?
DKIM records live at a selector you choose, like selector1._domainkey.example.com. The tool checks common selectors, but if yours is custom you may need to look it up by name with your mail provider.
Can I monitor email authentication over time?
Yes. Janitor checks SPF, DKIM and DMARC health on every client site and alerts you if a record changes or breaks.
Get started
Check it once, or watch it for every client
Janitor runs around two dozen checks on every site you manage and turns them into a branded report.
30-day free trial. No credit card required.