Our boss needs an expanded answer on spam vs junk mail. We currently use a spam filter at the server level to filter out spam and junk mail. We use Webroot. A couple of the bosses’ emails have gotten caught in the spam filter which we have corrected. Now the boss wants answers to what the difference is between spam and junk mail and why some email that does come through will land in the junk mail folder. They then want to decide whether or not we should use a spam filter at all, etc. So, I am looking for resources to read through to come up with something for them and hopefully keep us from going back to the 19th century. Currently over half of the email messages we receive are spam and the rest are legitimate according to Webroot report. Any suggestions appreciated.