SPF Lookup & Parser
Find and parse the SPF record for a domain.
About this tool
SPF (Sender Policy Framework) tells receiving mail servers which IPs are allowed to send mail for your domain. This tool fetches the v=spf1 TXT record, parses each mechanism, lists includes, and reports the catch-all (`-all` / `~all`) policy.
FAQ
- What's the difference between -all and ~all?
- `-all` (hardfail) tells receivers to reject any unauthorised IP. `~all` (softfail) tells them to accept-but-mark-as-suspicious. Use `-all` once your senders are confirmed; `~all` is a safer rollout.
- Why are SPF "include" loops dangerous?
- RFC 7208 caps DNS lookups during SPF evaluation at 10. Chains of includes can blow past this limit and cause "permerror" — receivers then treat the domain as having no SPF.
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