We finally found the solution to unsolicited and unwanted emails after
working with various "filters" for several years.
Filters did enable us to reduce the number of unwanted message delivered to
our Inbox (called "false negatives"). However, because every system we
tried resulted in filtering some important messages ("false politives") we
found it necessary to visually scan every message sent to the spam folder.
Although this was somewhat easier than carefully viewing every message, we
found that the increasing volume of spam was beginning to overwhelm us.
Spam Arrest has provided us with the easiest, cheapest, and most effective
method of eliminating this problem.