Where does the SPAMCuda system “sit” on a corporate or ISP network?
The system can sit either on the “outside” of a firewall, or, if you prefer, it can sit “inside”. The only requirement is that it must be able to receive SMTP transactions, and must be able to initiate them to the final delivery system, if you intend to run the software as an “appliance.” The software can also run on the same system that currently processes your email, if that machine runs FreeBSD 6.x or above.