I have a Windows 2008 domain that has Exchange 2007 installed. I have a server running a spam filter called LightSpeed (www.lightspeedsystems.com
) that has been working well however this new rash of spam, according to the LightSpeed technician, is TLS encrypted and so their filter never sees it. I need to find a way to stop it and need some advice. I can see on the receive connector that TLS is enabled. I only have the one Exchange 2007 server so do I need this to receive SMTP email? If not, how do I properly disable it to stop this spam?