SPF Checker

Validates a domain’s SPF (Sender Policy Framework) record — the DNS record that lists which servers are allowed to send email for your domain.

Try it: sendlucid.com/spf-checker

What you give it

A domain (e.g. yourbrand.com).

What it checks

• The domain has an SPF record, and only one (multiple SPF records is an error).
• The record stays within SPF’s 10 DNS-lookup limit — exceeding it causes SPF to fail.
• The fallback policy — the all mechanism: -all (strict, recommended), ~all (soft-fail), ?all (neutral), or +all (insecure).

It returns the raw record, the parsed mechanisms, the lookup count, and any issues found.

Why it matters

SPF is one of the three pillars of email authentication. A missing, duplicated, or overly permissive SPF record weakens authentication and hurts inbox placement.

How to read it

A healthy result has exactly one record, under 10 lookups, ending in -all (or at least ~all). If you’re over the lookup limit, consolidate or flatten includes; if you see +all, tighten it immediately.