Maintainer of the ZMI_GERMAN ruleset since 2005. This ruleset filters german spam without false positives, so is very safe to use. Get it via
sa-update --nogpg --channel sa.zmi.at
for the first time, then check the docs there for more and newer information.
e-mail: Please see the ruleset to get my contact address
more info about me at XING: https://www.xing.com/profile/Michael_Monnerie
e-mail for SPAMBOTs: firstname.lastname@example.org (please DO NOT send mail there, it's just a honeypot address)