SPF Record Checker


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An SPF record checker finds the TXT record that starts withv=spf1and reviews the mail senders it authorizes. Use rbls.org to inspect SPF policy data alongside DNS and email deliverability checks.

What SPF records do

Sender Policy Framework (SPF) tells receiving mail servers which hosts are allowed to send mail for a domain. SPF is published as a DNS TXT record, usually at the domain that appears in the email return path.

An SPF policy can authorize IP addresses directly withip4:andip6:, delegate to other domains withinclude:, refer to the domain's A or MX records, and end with anallmechanism such as-all,~all, or?all.

How to use it

Open an example SPF record lookup for example.com

Enter a domain and review its TXT records. The SPF record is the TXT value beginning withv=spf1. Check for missing SPF, multiple SPF records, invalid mechanisms, and policies that require too many DNS lookups.

What to review

Common SPF issues include no SPF record, more than one SPF record at the same name, syntax mistakes, staleinclude:providers, overly broad+allpolicies, and DNS lookup chains that can exceed the SPF limit of 10 DNS lookups.

This page keeps the SPF review practical. It identifies the record and explains common checks, but it should not be treated as a complete RFC 7208 validator for every edge case.

Use TXT Lookup to inspect all text records for the domain. Use Why Am I Blacklisted when SPF problems are part of a broader email reputation or blocklist investigation.

FAQ

What is an SPF record?
An SPF record is a DNS TXT record beginning withv=spf1that lists the hosts and services allowed to send mail for a domain.
Where should I publish SPF?
Publish SPF as a TXT record at the domain used in the email return path. For many senders this is the bare domain, but some systems use a subdomain.
Can a domain have multiple SPF records?
A domain should have only one SPF record at a given name. Multiplev=spf1TXT records can cause SPF evaluation to fail.
What is the SPF 10 lookup limit?
SPF evaluation allows at most 10 DNS lookups from mechanisms and modifiers such asinclude,a,mx,ptr,exists, andredirect.
Does SPF guarantee email delivery?
No. SPF is one authentication signal. Delivery also depends on DKIM, DMARC, IP reputation, domain reputation, content, and recipient filtering.