There are some local developments around the university that have hadme thinking about potential alternatives to our current system of spamfiltering; right now we rely on some commercial software that theuniversity has a site license for, but it's possible that the licensewon't be renewed at some point. In the process of this, I've realizedsomething.

One inobvious advantage of outsourced spam filtering is that it meansthat you are not in control of what gets filtered. That may sound likea disadvantage, but