Mail spam filter not working

Mail spam filter not working

From 8xxx version, I'm using mail spam filter with rule:
sender - not consist - @my_domain_name.com,@my_friends_domainname.com
But Today, it's stop working.
SDP 9014
I've got error in log:
Mail Filter condition matched. Hence not creating a new request. 

How can I fix this error?

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