Earlier today, I was doing a bit of tweaking and maintenance to the web server I hire from Memset.com. More specifically, I was poking around the Web Host Manager control panel, trying to resolve some email issues for a client whose site and email I host. When I looked at the Mail Delivery Stats (something I had never done before), I was shocked by what I saw: more than 75% of all emails coming into the web server were spam sent to non-existent email addresses!
Take a look at this chart which I downloaded from the Web Host Manager:
The red sections of the charts labelled :blackhole: show the incredible percentage of spam sent to non-existent email addresses.
By way of explanatory note, use of :blackhole: stops all misdirected spam from being delivered. For example, your real email address is email@example.com. A spammer sends email to your real email address but also to firstname.lastname@example.org and email@example.com and firstname.lastname@example.org, etc. Using :blackhole: prevents all those misaddressed emails from being delivered to your inbox.
What really irritates me about the above graphic is that is clearly shows how much wastage and trouble spamming really costs. My server would presumably be more efficient if it were not being hammered by spam.