Hi Spam Expert,
we have an SBS 2008 server, suddenly outgoing emails (not all) are going to the SPAM box of the recepient - IE. www recipients out side of the domain .
The only thing thats changed recently is the ISP (we do not use pop3), the isp provide us with broadband services and a static IP address .
Oh and we put the usual updates on the server - SPAM filters etc, but I think this would only effect incoming mail which is not a concern