Specialist check
Free SPF record checker
Use this SPF checker to look up a domain's SPF record, catch duplicate records, and see how many DNS lookups it uses against the limit of 10 before a cold email launch.
- Checks
- Reads the public SPF record, parses lookup mechanisms, follows include and redirect branches, and counts recursive DNS lookups.
- Cannot tell
- It cannot prove which sender path a real message used.
Expected time: about 5 to 20 seconds. Some public services can take longer.
Source: Live Google Public DNS. Recursive include and redirect branches are fetched during this run.
Questions
SPF (Sender Policy Framework) is a DNS TXT record that lists which servers are allowed to send mail for your domain. Receivers check it to decide whether your mail is legitimate.
SPF allows at most 10 DNS lookups when it evaluates includes, a, mx, exists, and redirect mechanisms. Go over 10 and SPF returns permerror, which can fail authentication. Cold email stacks hit this fast because each tool adds an include.
No. A domain must have exactly one SPF record. Two or more is a misconfiguration that fails SPF. Merge them into a single record.
Pause the affected launch, identify the owner of the sending record, and remove the duplicate record or unused sending include. Run a fresh check after the DNS change, then record the result with the client launch evidence.
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