Letting Gnus run sa-learn
After being fed up with spam I decided to install "SpamAssassin":http://www.spamassassin.org/ on my server. This was very easy and with a bit of tweaking to the suggested .procmailrc everything's running fine. The only thing missing was a keyboard shortcut in "Gnus":http://www.gnus.org/ running sa-learn for spam & ham mails...