Open the Email Setup Checker
Free SPF, DKIM, DMARC and MX checker. Test your domain's email authentication, see a 10-point score, spot errors like multiple SPF records or DMARC p=none.
- Free to use
- No signup
- Nothing to install
- Works in any modern browser
Your input
The actionA real example, step by step
Real data entered into the Email Setup Checker, one screenshot per step. Nothing is mocked up.
Open the tool
The Email Setup Checker opens ready to use, nothing to install or sign up for.
Enter your data
Real input used here: Domain used for email example.com; DKIM selectors to look for (comma-separated) google,selector1,selector2,default,k1....
Press Check email setup
The Email Setup Checker shows the result straight away, below the same form.
What is the Email Setup Checker?
If your emails land in spam or somebody is sending mail pretending to be your domain, the cause is usually missing or broken email authentication. Enter your domain and this checker looks up its MX (mail servers), SPF (which servers may send), DMARC (what to do with mail that fails checks) and DKIM (digital signatures), plus the optional MTA-STS, TLS-RPT and BIMI records, and gives your setup a score out of 10.
Every finding comes with a plain-language explanation and a fix: multiple SPF records (invalid), more than 10 DNS lookups in SPF, a soft or permissive “all”, a DMARC policy stuck on p=none, or no reporting address. Because DKIM keys are published under a provider-specific selector, the tool tries the common ones (Google, Microsoft 365, Zoho and others) and lets you add your own. Lookups use Cloudflare's encrypted DNS from your browser.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Analysed and explained one by one.
A quick overall verdict for your domain.
Multiple SPF records, too many lookups, weak policies.
MTA-STS, TLS-RPT and BIMI.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
How it compares
A plain look at this tool next to the usual alternative.
| This utility | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
Questions people ask
What are SPF, DKIM and DMARC?
SPF lists servers allowed to send for your domain, DKIM signs messages, and DMARC tells receivers what to do when SPF or DKIM checks fail and where to send reports.
Why does my email go to spam?
Missing authentication is a top reason. Fixing SPF, DKIM and DMARC greatly improves delivery.
What is a DKIM selector?
A name that points to your DKIM public key, like google._domainkey.yourdomain.com. Your email provider tells you the selector to use.
Why is p=none not enough?
It only monitors. To stop spoofing you need quarantine or reject.
What does a null MX mean?
A record “0 .” that declares the domain never receives email, which is fine for a domain that only sends.
More free tools
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Test your domain's email authentication and get a score with fixes. Free to use.
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