Definition
SPF records whitelist sending IPs for a domain. Receivers only use it for direct, unforwarded mail.
Best Practices
- Keep SPF records short and within the DNS limit.
- List all legitimate sending hosts and no more.
- Review records when you change providers.
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Related Glossary Terms
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Frequently Asked Questions
It authorises certain servers to send from your domain.
Too many lookups can break SPF validation.
Poorly; that is why DKIM and DMARC add context.