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📧 Email DNS Check
Mail delivery problems usually trace back to a missing or wrong DNS record. This tool queries the records every mail-sending domain should have — MX, SPF (TXT), DMARC (TXT at _dmarc) — and flags weak or missing configs.
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Examples
Typical
Input
example.comOutput
MX: ✓ · SPF: ✓ v=spf1 include:_spf.google.com ~all · DMARC: ⚠ p=noneFrequently asked questions
Why does DKIM need a selector?
DKIM keys are stored at selector._domainkey.yourdomain. Each mail provider uses different selectors (google, mail, default). Without knowing the selector, we cannot look it up directly — DKIM is checked separately.
About this calculator
Email DNS Check runs entirely in your browser using standard formulas. No data is sent to any server. We don't share your inputs with lenders, brokers, or anyone else — there's no funnel and no follow-up email.
Related tools
- 🔍 DNS Lookup — Look up DNS records (A, AAAA, MX, TXT, NS, CNAME) for any domain.
- ✉️ SPF Record Builder — Build a valid SPF TXT record for your email domain.
- 🛡️ DMARC Record Builder — Build a valid DMARC TXT record with reporting addresses.
Why this tool
vs typical free network-tools sites
| NetToolset | Typical free site | |
|---|---|---|
| Price | Free | Free |
| Signup required | No | Often (for advanced features) |
| Ads inside the tool | No | Yes (banner + interstitial) |
| Logs your IP / queries | No | Yes (often resold) |
| Data sent to a server | Math runs in browser; lookups hit Cloudflare DoH directly | Yes (all goes through their server) |
| Open source | Yes | No |
| Bookmarkable URL per tool | Yes | Mixed |
| Multilingual | EN / ES / PT / FR / DE | Usually EN only |
| Loads in under 1s | Yes (static) | Often slow (ad tracking) |