SPF Record Lookup
Check Sender Policy Framework (SPF) records to verify which servers are authorized to send email for a domain. Essential for email authentication and deliverability.
About SPF Records
Sender Policy Framework (SPF) is an email authentication method that allows domain owners to specify which mail servers are authorized to send emails on behalf of their domain.
Key SPF components:
- v=spf1 - Identifies the SPF version
- include: - References other domains' SPF records
- mx - Authorizes the domain's MX servers
- a - Authorizes the domain's A record
- ip4/ip6 - Authorizes specific IP addresses
- -all - Hard fail (reject unauthorized emails)
- ~all - Soft fail (mark as suspicious)
- +all - Pass all (not recommended)