RE: VGER does gradual SPF activation (FAQ matter)

["David Schwartz" <davids@webmaster.com>]

> Rather than inject emotions let's play a little bit with facts. This is
> excerpts from a SpamAssassin report for about 82000 emails.
>
> TOP SPAM RULES FIRED
> ------------------------------------------------------------
> RANK    RULE NAME              COUNT %OFRULES %OFMAIL %OFSPAM  %OFHAM
> ------------------------------------------------------------
>   49    SPF_SOFTFAIL           1804     0.42    2.20    8.31    0.01
>   72    SPF_HELO_PASS          1112     0.26    1.36    5.13   47.45
>   78    SPF_PASS                994     0.23    1.21    4.58   45.53
>   92    SPF_HELO_SOFTFAIL       772     0.18    0.94    3.56    0.03
>  113    SPF_FAIL                589     0.14    0.72    2.71    0.00
>  177    SPF_HELO_FAIL           352     0.08    0.43    1.62    0.00
>
> Stated from the opposite view
>
> TOP HAM RULES FIRED
> ------------------------------------------------------------
> RANK    RULE NAME              COUNT %OFRULES %OFMAIL %OFSPAM  %OFHAM
> ------------------------------------------------------------
>    5    SPF_HELO_PASS          28563     7.20   34.88    5.13   47.45
>    6    SPF_PASS               27409     6.90   33.47    4.58   45.53
>
> And so forth.
>
> People here should be smart enough to draw their own conclusions from
> raw data.

	Yeah, that you measured the wrong thing. SPF does not distinguish spam from
non-spam.

	What percentage of emails with forged sender addresses passed an SPF check?
What percentage of emails with forged sender addresses failed an SPF check?
What percentage of emails that correctly identified their senders passed an
SPF check? What percentage of emails that correctly identified their senders
failed an SPF check?

	SPF is an anti-forgery tool. It helps to prevent joe-jobs and false claims
of being the victim of a joe-job.

	DS


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