Results in preventing spoofing and phishing attacks against the email domain. SPF record determines which email servers are authorized to send the email(s) on the domain's behalf. Sender Policy Framework or SPF is one of those standards. With time, several standards have developed to stop that practices. The battle against spam and email scam continues. However, when it comes to verifying the From address, DMARC is relatively more reliable than SPF.

Therefore, SPF is one of the many factors that determine either email should be delivered or not. The receiving ISP takes the final decision.

So if the message fails SPF validation, there is no guarantee that it would not be delivered. The only limitation is that the recipient sees the From address in its email client. Therefore, your email can pass the SPF record validation even if From address is fake. Return-Path is the mailing address that receiving mail servers use to notify the problems like delivery problems to the sending mail servers. Instead, it looks at the Return-Path to validate the originating server. The SPF record does not validate against the From domain.

It enables the domain to announce the list of approved senders publicly. It's a TXT record added to a domain DNS record that specifies the IP addresses allowed to send emails on behalf of the domain. About SPF Record Tester - Prevent Spoofing & Improve Email Reliability What is an SPF record?.

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