I currently have an Exchange 5.5 server that receives it's internet mail from an IIS 5.0 SMTP relay.<BR><BR>Spam is an increasingly large problem, so I'd like to look at putting in an SMTP relay that ...

I am looking into a low cost resolution to attachment filtering and content filtering of email coming in and going out of our Exhange server. I am pretty familiar with Linux and this get a Linux box ...