[vox-tech] Help with regular expressions needed.

[Ryan]

I'm trying to setup a mail filter in kmail to deal with an annoying spammer 
who's isp won't kick him off. His subjects are allways devoid of lowercase 
letters.  Kmail allows sorting by whether or not a header matches a regular 
expression.  So I told it to kill anything not matching the regexpr 

[^a-z]*[a-z]+.*

but this doesn't work. A little help?