I have a Redhat 7.3 system running Postfix, Spamassassin 2.55 and Amavisd-new that filters mail and relays it on to an Exchange server. I have noticed that obvious spam is not being caught and is being relayed on. One of these emails scored 1.6 when it went through the system. I copied and pasted the message source into a text file and ran only Spamassassin on it and it scored 18. Can anyone suggest where I can look to find out why this is happening?
Thanks in advance
Owensboro Public Schools