SPF checker
Inspect a published SPF record and its recursive DNS lookup budget.
Inputs are sent to our server to run this check. They are not included in usage analytics.
Your result
Add your inputs, or try the example, to see your result here.
SPF authorizes envelope senders, not message content or inbox placement.
How to use this tool
- Looks up the live TXT record and follows supported include and redirect mechanisms.
- Reports each lookup and uncertainty rather than assuming an unreachable lookup is safe.
What the result tells you
- SPF authorizes envelope senders, not message content or inbox placement.
- Macros and some dynamic mechanisms require a real sender IP and are marked unknown.