On Fri, 7 Oct 2011, Paolo Carlini wrote: > Sorry if I'm saying something totally obvious - I'm quite naive in this > area - but do spam filters based on the language of the text already > exist?
Yes, SpamAssassin has a filter which tries to implement that: For my primary mailbox, I have ok_languages en de in .spamassassin/user_prefs and then filter (or score) on ^X-Spam-Status: .*UNWANTED_LANGUAGE Gerald