Re: [Evolution-hackers] spam filtering

[guenther <guenther rudersport de>]

> User view
> 
>       * incoming messages are identified by spam filter as spam or
>         nospam (IMAP messages are filtered once completed - fully
>         downloaded). 
>       * spam messages are moved to Spam folder or deleted

IMHO it is generally a good idea, to fine grain the actions taken as
result of SPAM filtering.

This is true for users, moving mails to different folders ("likely spam"
and "hell, this IS spam") [1]. This is even more necessary, when
deleting mails, cause almost *no* one sane will delete any mail, that
just jumped over the barrier of being classified as SPAM.

Of course, this would require *2* filters, but the mails should only be
checked for the SPAMines *once*. Difficult [2] to express clearly in the
UI, to be understood by the average (or even lower) user.


Just having no filter "evaluate SPAM status" as this is done by a
checkbox somewhere isn't a solution, as SPAM filtering has to be
adjustable in the order of all filters [3].


[1]  Now, this gets even more complicated considering the discussion
vFolders vs. real folders...

[2]  A possible solution would be a 3 step solution: 1) A filter
"evaluate SPAM score" without any action taken. 2) A filter to delete
mails with a SPAM score above X. 3) A filter to move mails with a SPAM
score above Y (Y<X).

[3]  Adjusting the precedence of SPAM filters is necessary, as it often
is wise to *not* check mails by mailing lists and move them before any
SPAM filtering is done (this can improve speed for users subscribed to
high volume mailing lists). And even worse: "Can you say SpamAssassin
mailing list?" ;)

...guenther


-- 
char *t="\10pse\0r\0dtu\0  ghno\x4e\xc8\x79\xf4\xab\x51\x8a\x10\xf4\xf4\xc4";
main(){ char h,m=h=*t++,*x=t+2*h,c,i,l=*x,s=0; for (i=0;i<l;i++){ i%8? c<<=1:
(c=*++x); c&128 && (s+=h); if (!(h>>=1)||!t[s+h]){ putchar(t[s]);h=m;s=0; }}}