How do I report a spam to Razor?
Since SpamAssassin modifies the message, you should not use razor-report directly. Instead, call
spamassassin -r < message.txt
This will strip off the SpamAssassin additions and report it to Razor, DCC, and Pyzor – and as a bonus, in 2.50 will train the Bayesian learner to treat future similar mails as spam.