[exim] Stock Spam Blocking ACL - Revised again

I think I have it now. It's blocking a spam abut ever 4 seconds on my
system.

deny    regex = \NSym.*\W[A-Z]{4}\W\N
        regex = \NCurrent Price.* Around.*[01]\.[0-9]{2}\N
        message = REGEX - Stock Spam - ($regex_match_string)