As the authors of spam messages continuously improve the technologies by which they distribute unwanted mail , therefore it is also necessary to systematically improve and upgrade systems of protection from the unwanted mail .
Kako autori ' spam ' poruka konstantno unapređuju tehnologije kojima distribuiraju neželjenu poštu , tako je nužno sustavno unapređivati te nadograđivati i sustave zaštite od neželjene pošte .