SPF Checker

Inspect an SPF TXT record, authorized senders, and configuration risks that may affect email delivery.

What is SPF Checker?

SPF Checker is an online analysis tool for checking a domain’s SPF TXT record and the sources authorized to send email for it. It helps you reach the right data quickly when domain, IP, email, or certificate infrastructure changes.

This page provides a clear definition, usage steps, and interpretation guide. Results can depend on DNS caches, registry privacy, CDNs, network timeouts, and remote service availability. Confirm critical changes with an authoritative provider or more than one resolver.

How does it work?

The request is sent to the appropriate technical source for the input type. The result may include the SPF policy, include mechanisms, IPv4 and IPv6 permissions, the all mechanism, and possible DNS lookup-limit risks. Always evaluate the returned value together with its source, timestamp, record type, and intended configuration.

How to use it

Open the tool above and enter the target. Example: ornekalanadi.com.
Check the input format and submit the request.
Compare dates, hostnames, priorities, policies, and returned values with the expected configuration.
If you make a correction, wait for the relevant cache or TTL and test again.

How to interpret the results

A technically valid response is not automatically a correct configuration. Investigate unexpected hosts, expired or nearly expired certificates, incorrect IP addresses, missing authorization, and inconsistent DNS records. Back up the current configuration before changing production systems.

Frequently asked questions

What is SPF?

SPF is a DNS policy that lists servers allowed to send email for a domain.

Can a domain have multiple SPF records?

No. A domain should publish only one SPF TXT record.

What is the difference between ~all and -all?

~all means softfail and -all means fail; choose after verifying every legitimate sender.