Howto subscribe

How do I subscribe to this list? The man page and the faq just say I
should send mail to 
procmail-request(_at_)informatik(_dot_)rwth-aachen(_dot_)de(_dot_)

Well, what exactly? I sent

  subscribe procmail(_at_)informatik(_dot_)rwth-aachen(_dot_)de 
walter(_dot_)haidinger(_at_)gmx(_dot_)net

in the body to procmail-request(_at_)informatik(_dot_)rwth-aachen(_dot_)de but 
no reply
yet. This is AFAIK the usual subscription method.

Thanks, Walter

--
Haidinger Walter <walter(_dot_)haidinger(_at_)gmx(_dot_)net>
Student of Electrical Engineering, University of Technology, Vienna, Austria
Address: Brunnerstr.6, A-3108 St.P"olten, Austria. Tel.: +43-2742-257191