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Terme informatique

SPF

A record DNS which indicates which servers are allowed to send emails for a domain.

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Simple definition

SPF helps recipients to check that a server has the right to send a message to your domain name.

Technical definition

Sender Policy Framework is published in a TXT record. The recipient server compares the sending IP address to the declared mechanisms and applies a result like pass, fail or softfail.

What is it used for ?

Reduce domain usurpation and improve the delivability of legitimate emails.

Practical example

The domain allows Microsoft 365 and the server of the website to send messages.

Common issues

  • Several recordings SPF
  • Exceeding 10 searches DNS
  • Forgotten shipping service.
  • Too permissive use of +all

DNS · SMTP · DKIM · DMARC · Phishing

Key takeaway: This entry explains the general operation of the term. Exact settings may vary depending on software, vendors and environments.

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