The headers Postini’s anti-spam system adds to emails are quite hard to filter on, as you need to compare part of one header to part of another. Here’s a little snipped that works with dovecot 1.2’s sieve implementation. I don’t actually use this myself anymore, but I’m posting it here for anyone else struggling with the problem.
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if not header :matches "X-pstn-addresses" "good)" { # 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" "${1}"; set "scoredp" "${2}"; if header :matches "X-pstn-settings" "? (*:*.*) *" { set "threshold" "${3}"; set "thresholddp" "${4}"; if string :value "lt" "${score}" "${threshold}" { fileinto "postini"; stop; } } } } |
As a quick note, my final solution was to add a much simpler header after using exim’s perl integration to parse the postini headers.