SPF

SPF

Sender Policy Framework.

SPF is an open standard which attempt to address spoofing of email addresses, by providing a standard mechanism to verify that the sending domain is permitted to send emails on behalf of that domain.

SPF records indicate which mail servers are permitted to send email with a given "from" address. SPF is an attempt to counter "e-mail address spoofing", where a sender (typically a spammer) uses someone else's e-mail address as the apparent sender of an e-mail.

cf SIDF.

For more information see:

• http://old.openspf.org/dns.html - Setting up SPF DNS records.
• www.openspf.org - Sender Policy Framework project homepage.
• www.openspf.org/FAQ - SPF FAQ.