Signal & Syntax · Email deliverability
What Is SPF in Email?
SPF (Sender Policy Framework) is a DNS TXT record listing a domain's permitted sending servers. RFC 7208 defines SPF.SPF (Sender Policy Framework) is a DNS TXT record listing a domain's permitted sending servers. RFC 7208 defines SPF.SPF (Sender Policy Framework) is a DNS TXT record listing a domain's permitted sending servers. RFC 7208 defines SPF.
Also calledSender Policy Framework
Example
v=spf1 include:_spf.google.com ~all
SPF in Practice
The receiving server checks the sending IP against the domain's SPF record. A mismatch counts against the message. SPF checks the envelope sender, not the From address a reader sees. The receiving server checks the sending IP against the domain's SPF record. A mismatch counts against the message. SPF checks the envelope sender, not the From address a reader sees. The receiving server checks the sending IP against the domain's SPF record. A mismatch counts against the message. SPF checks the envelope sender, not the From address a reader sees. DMARCDMARC ties the two together. ties the two together. ties the two together.
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