Rul set for Spam Subject Text ???

[jay shi]

Hi ,
     I am using MailScanner  4.48.4 with multidomain
sendmail. For low Score SPAM i am using this 
Spam Subject Text = {possible spam} as a tag
     One of my domain ask me, he dont't want this tag
, but other domains are demanding this feature.
     i want to write rule set for above condition,i
made 
the required rulset but it is not working.Is any one
knows how to write this rule set ?

Thanks & Regards
Jayesh
 

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