SPF is a DNS TXT policy that lists which mail sources are allowed to send mail for a domain.

Does SPF alone protect email?

No. SPF should usually be reviewed alongside DKIM and DMARC.

What does multiple SPF records mean?

Multiple root SPF records can cause receivers to treat SPF as invalid.

Email Security Tool

SPF Checker

Find the SPF TXT record for a domain and review common policy signals. This does not replace a full mail-flow or deliverability diagnosis.

Check SPF

Enter a domain to check SPF.

Technical response details (optional)

What the results mean

A normal SPF policy starts with v=spf1. Broad mechanisms such as +all can be risky, while too many includes can hit SPF lookup limits.

How to use this tool

Enter the organizational domain.
Review whether exactly one SPF record exists.
Check DMARC after SPF so receiver policy is also visible.

FAQ

Does SPF stop spoofing by itself?

No. SPF is one signal. DMARC alignment and DKIM also matter.

Is `~all` bad?

Not automatically. It is a soft-fail policy and may be intentional during rollout.

Can this validate every include?

No. This first pass highlights the root SPF record and obvious structure signals.

B2B diagnostic report model

Email domain diagnostics

Email checks connect MX, SPF, DMARC, optional DKIM selector records, PTR/rDNS, sender-IP context, blacklist context, and email-header evidence.

SummaryStart with a plain-language status for the public target.

Top issuesPrioritize the few findings that need attention first.

What passedShow expected public signals without turning them into a certification.

What needs reviewSeparate limited, unavailable, and review-worthy signals.

Why it mattersExplain the business, delivery, crawl, or implementation impact.

Recommended fixesPoint to the DNS, hosting, email, CMS, or SEO owner who can act.

What this tool cannot checkThis does not send mail, inspect private mailboxes, guarantee inbox placement, or certify sender reputation everywhere.

Client-safe copyClient-safe copy should keep authentication findings and fixes while removing email local-parts, raw TXT payloads, raw sender IP details, and private mailbox context.

Monitoring beta (optional)Optional monitoring beta can compare MX, SPF, DKIM selector checks, DMARC policy, PTR/rDNS, and selected blacklist signals for approved domains.

Client-safe report

Share findings without leaking raw technical material

Use Safe Copy or this page's summary when sending results to a client, vendor, developer, or support team. Raw headers, credentials, tokens, cookies, private addresses, email local-parts, and oversized payloads should stay out of client-facing copy.

Review Safe Copy Ask about monitoring beta

Check my email domain

What this checks

Public mail-domain records and pasted email-header signals such as MX, SPF, DMARC, DKIM selector context, and sender-route clues.

Limits

What this cannot check

It cannot guarantee inbox placement, inspect private mailboxes, or certify sender reputation everywhere.

Read results

How to use the output

Treat results as review signals for this browser/session or public target. Re-test after one change, then use Safe Copy or notes that avoid raw identifiers.