N\u00f8gleord<\/a> eller n\u00f8gles\u00e6tninger
\n- Hashcash-systemet (Proof-of-Work)
\n- DIM og SPF
\n- URL-lister som output fra trackere som uribl.com<\/p>\nBayesiansk filter<\/h2>\n
Ud over de mere eller mindre statiske filtreringssystemer har SpamAssassin en Bayesiansk filtreringsalgoritme, der er i stand til at \"l\u00e6re\" visse heuristikker, dvs. tilbagevendende, karakteristiske elementer, fra spammails, der allerede er blevet sendt, og dermed tilpasse sig brugerens adf\u00e6rd. Systemet er baseret p\u00e5 Byssian-begrebet om sandsynlighed, men er ofte blevet kritiseret, fordi et uindl\u00e6rt filtreringssystem ofte giver falske positive resultater.<\/p>\n
For at undg\u00e5 dette anbefales det at foretage en mere detaljeret kontrol af de e-mails, der er klassificeret som spam, f\u00f8rst. Bayes-filteret indeholder et v\u00e6rkt\u00f8j, som kan kaldes via kommandolinjen sa-learn, hvormed enten individuelle e-mails eller hele postkasser kan gennems\u00f8ges for heuristik. Hvis denne proces er blevet udf\u00f8rt et par gange, falder antallet af falske positive resultater betydeligt.<\/p>\n
Nuv\u00e6rende udvikling<\/h2>\n
I forbindelse med de seneste opdateringer til version 3.3 og 3.4 har SpamAssassin f\u00e5et en vigtig ny funktion, som formodes at have en effekt p\u00e5 ressourceforbruget. Selv om der tidligere er foretaget nogle optimeringer af ydeevnen, er det nye, at programmet nu opf\u00f8rer sig som en deterministisk endelig automat. Grundl\u00e6ggende kan hardwaren bedre tilpasse sig til DEA'er, fordi de mulige tilstande altid k\u00f8rer deterministisk, dvs. forudbestemt. Et hensigtsm\u00e6ssigt programmeret system - som f.eks. den nuv\u00e6rende serverhardware - kan s\u00e5ledes reservere og frig\u00f8re ressourcer p\u00e5 en tidskritisk m\u00e5de.<\/p>\n
Programst\u00f8tte<\/h2>\n
Som allerede n\u00e6vnt er den h\u00f8je fleksibilitet i programkoden et unikt salgsargument, men SpamAssassin har ogs\u00e5 en succesfuld API, som g\u00f8r det muligt at udveksle data med mange andre programmer. I forbindelse med open source-projekterne omfatter disse de ofte anvendte e-mail-klienter Mozilla Thunderbird, KMail samt Novell Evolution eller eksotiske programmer som Citadel eller Claws Mail. I kommercielle produkter er SpamAssassin allerede integreret i programkoden. Dette er f.eks. tilf\u00e6ldet med Icewarp-serveren, McAfee SpamKiller, Mac OS X-serveren eller Sophos PureMessage.<\/p>","protected":false},"excerpt":{"rendered":"
Pro Tag werden 28 Milliarden SPAM-Mails versendet. Das ist ein Gro\u00dfteil des gesamten E-Mail-Verkehrs und kaum ein E-Mail-Konto bleibt von den unerw\u00fcnschten Werbemails verschont. Die bisher einzige M\u00f6glichkeit, sein Postfach vor ihnen zu sch\u00fctzen, ist ein guter und funktionierender Spam-Filter. Auch SpamAssassin ist ein solcher Spam-Filter, jedoch macht ihn vor allem sein buchst\u00e4blich handverlesener Algorithmus 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