Your Mail Server appears in a SPAM RBL

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Your message with subject : [Scanned by Extranet - VIRUS] Returned mail: see 
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has been blocked because your Mail Server appears in the Spamhaus Real-time 
Black List ( http://www.spamhaus.org ). The message was sent from speechd at 
lists.freebsoft.org to warvictims at minsoc.fed.be

If necessary you can send your message, including the destination address(es) 
to Helpdesk at minsoc.fed.be. Then the Helpdesk will forward the message to the 
destination address(es) you named.