[Dovecot] sieve filters

[Ian P. Christian]

Hi all,

I'm trying to figure out a way of filtering mail from a commercial
anti-spam platform.  Unfortunately you need to compare part of one
header against part of another header.  I figured I could solve this
using sieve variables and pattern matching, however I'm having little
luck and don't know how to debug sieve issues.

# example headers:  must compare 0.00799 against 1:0000 (the 2nd
number in the 2nd header)
# X-pstn-levels: (S: 0.00799/98.42547 CV:99.9000 FC:95.5390 LC:95.5390
R:95.9108 P:95.9108 M:97.0282 C:98.6951 )
# X-pstn-settings: 3 (1.0000:1.0000) s cv gt3 gt2 gt1 r p m c

if header :matches "X-pstn-levels" "(S: */*"
{
  set "score" "${1}";
  if header :matches "X-pstn-settings" " ? (*:*) *"
  {
    fileinto "somewhere";
  }
}


The first if appears to match, as if I move the fileinto up there it
works - however it doesn't work as it shown here.  Can anyone suggest
why?  Can I achieve what I'm trying to do with sieve?  How can I go
about debugging scripts?

Thanks,

Ian