Within our company, M&M Golf Cars, there are three companies under us, with everything from sales to marketing to customer interaction, both inbound and outbound. Anytime that we receive any type of email, it gets filtered through SpamTitan.
The way that we have it set up is to filter on keywords. If something looks like it was written by a human, it will allow it to pass through, unless it throws some kind of flag that something looks suspicious. In general, it simply routes emails to our employees, giving us warnings if there is anything suspicious that we need to know about, before those emails actually are received.
We use the cloud version of the solution, we don't have an onsite server. We have multiple companies within my company, but we've set them all up to route through SpamTitan.