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SPF

SPF

Sender Policy Framework. 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.

Relevant links:

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.

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