Sender Policy Framework (SPF)

SPF - Sender Policy Framework

What is it?

Sender Policy Framework. Anti-spam technique based on verifying the source of an email.

How does it work?

You create a list of all the mail servers that are allowed to send mail for your domain, and add it as a dns txt record. For example:        300   IN   TXT   "v=spf1 ip4: -all"
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Challenge & Response Mail

Some people like to keep their mailboxes free of spam. Some people like to invent ways of avoiding spam. And some people like to keep their mailboxes free of the results of such actions.

A typical extract from the mailing list:


Anti-spam framework which incorporates textual analysis, RBLs, Bayesian statistics and on-line spam databases. Works very well indeed -- one big plus of SpamAssassin compared to the purely statistical filters is that it works pretty good straight out of the box, without requiring training.

Here's the page:

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