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Deliverability

SPF (Sender Policy Framework)

SPF is a DNS-based email authentication protocol that specifies which mail servers are authorized to send email on behalf of a domain.

SPF (Sender Policy Framework) is an email authentication method that allows domain owners to publish a DNS record listing the IP addresses and servers authorized to send email from their domain. When a receiving mail server receives an email, it checks the SPF record to verify the sending server is authorized. A passing SPF check helps prevent email spoofing and improves deliverability. SPF works alongside DKIM and DMARC to form the three pillars of modern email authentication. A properly configured SPF record is essential for any cold email outreach program.
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