SPF record presence
Find SPF records published as TXT records for your domain.
100% Free • No Signup • Live DNS
SPF Checker
Check your SPF record, validate syntax, review authorized senders and find email deliverability issues.
SPF syntax • Authorized senders • DNS lookup limit • TXT records • Email deliverability • No signup
What this checker validates
One check reviews your SPF record, syntax, sender mechanisms and DNS lookup limits.
SPF syntax
Validate SPF mechanisms, qualifiers and formatting.
Authorized senders
Review allowed IPs, includes, A/MX mechanisms and sender rules.
DNS lookup limit
Check whether SPF mechanisms may exceed the 10 DNS lookup limit.
Policy mechanism
Review whether your SPF ends with -all, ~all, ?all or +all.
Multiple SPF records
Detect multiple SPF records, which can break SPF validation.
Common SPF issues this tool can detect
Find configuration problems that can affect email delivery and sender authentication.
- MissingSPF record missing
- DuplicateMultiple SPF records found
- PolicySPF record contains +all
- SyntaxSPF record has invalid syntax
- DNSSPF record may exceed 10 DNS lookups
- PolicySPF record has no all mechanism
- PolicySPF policy is too neutral
- MechanismDeprecated ptr mechanism used
How SPF checking works
The checker reads DNS TXT records and validates the SPF policy published for your domain.
Enter your domain
We clean the input, remove protocol or path, and validate the domain format.
Read TXT records
The tool finds TXT records and detects records that start with v=spf1.
Validate SPF rules
We check syntax, mechanisms, policy, duplicate SPF records and DNS lookup usage.
Understanding SPF results
Passed
A valid SPF record was found and no major issues were detected.
Review
The SPF record exists, but optional improvements or policy review may be useful.
Warning
SPF has a configuration issue that may affect email authentication.
Failed
SPF is missing, duplicated or has a serious syntax/policy issue.
SPF helps receiving mail servers verify which servers are allowed to send email for your domain.
Preparing SPF check…
Need help fixing SPF or email authentication?
Send us your domain report and we’ll review the issue.
Frequently asked questions
An SPF record is a DNS TXT record that tells receiving mail servers which servers are allowed to send email for your domain.
No. ~all is a valid softfail policy and is commonly used. It may be acceptable depending on your email setup.
No. The + qualifier is valid in SPF and means Pass. Because Pass is the default qualifier, +a and a are equivalent.
No. A domain should publish only one SPF record. Multiple SPF records can cause SPF validation to fail.
SPF evaluation allows a maximum of 10 DNS lookups from mechanisms such as include, a, mx, ptr, exists and redirect.
No. The SPF Checker is free and does not require signup.