sieve rule for "header don't exist"

[Reindl Harald]

is there a way to expresse when the header "X-Spam-Status" *do not* exist move the message to a different folder?

:contains, :matches and :is are not helpful here

background:

the spamass-milter option -B is lacking the spamassassin headers in case of milter-rejects and via sendmail generated BCC while flagged messages contain the headers - so it would be nice to move the rejected ones to a subfolder "REJECTED" instead into the inbox

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