This log entry means that the checksum of the email message that has been sent from IP 192.168.1.1 to 66.66.66.66 has matched against an entry in the FortiGuard AntiSpam checksum blacklist.
All FortiOS
Submit an e-mail to the address removespam@fortinet.com to re-investigate the checksum in order to have it removed from the Fortiguard Antispam Database.
Visit the web site http://www.fortiguard.com/antispam/antispam_info.html#spamcontact for more information.
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