Use POPFile with a Virus Scanner or Other POP Proxy

If you tell me a story — about a cat changing your computer's clock, for example —, you can be sure that I will retell the story to somebody else. Maybe by then the cat has turned into a mouse, and if the story is told to yet another person, I bet the mouse will have used the computer to write a yoga book.
Clearly, some information has been lost or replaced by fiction. If you retrieve your mail through both a spam and and a virus filter, you get a chain that removes most of the junk and dangerous emails:
If you use a anti-virus program that scans all mail for viruses as you download it, you can still use POPFile to filter the same mail for spam. Here's how to set up such a chain of POP proxies for total protection.