SPF check
Check and analyze SPF via encrypted DNS-over-HTTPS.
The DNS query is sent directly from the browser to Google Public DNS. Nyttio does not store the data.
1. Enter domain
Quick selection
2. Overview
Results appear after you check a domain.
3. SPF-breakdown and analysis
Results appear after you check a domain.
4. Detailed lookup information
Results appear after you check a domain.
5. SPF-test (optional)
Test whether an IPv4 address explicitly matches published ip4 networks.
This is a simplified local simulation. The final result may depend on the receiver's DNS and SPF implementation.
SPF result guide
Pass = allowed, SoftFail = probably not allowed, Neutral = no definitive answer, Fail = not allowed.
Common SPF mechanisms
a · mx · ip4 / ip6 · include · all
Best-practice tips
End with -all or ~all, stay below 10 DNS-causing terms, and avoid +all.