Only one in 40 e-mails is NOT spam

Microsoft has revealed that almost all e-mails sent today are spam – though the figure fell slightly with the disconnection of a hosting provider which numbered a major spam network among its customers.

The figures only relate to e-mails sent to customers of the Microsoft Forefront Online Security for Exchange service (FOSE) rather than the internet as a whole, though that’s a sample group big enough that it should be pretty representative of all web users.

In the second half of last year, 97.3% of all e-mails which went through FOSE were filtered out as spam. That figure is actually a slight drop on the first half of the year as the number of spam messages picked up by the system fell from around 80 billion to 50 billion after web hosting firm McColo had its connection cut.

Two internet service providers ditched McColo as a customer after an industry-wide investigation in conjunction with the Washington Post concluded the firm was hosting sites responsible for three-quarters of the world’s spam. It also hosted the bogus sales sites which many of the spam messages linked to.

As the Microsoft figures only go up until December, they don’t give any answer to the question of whether the spammers have been able to find new hosts and rebuild their network.

The report also shows that Microsoft’s anti-spam techniques continue to work more effectively. Until 2007, only around 60% of messages were marked as spam at the first filtering stage which looks at the origins of the message and whether it is properly addressed. Today that figure is 89.7%, meaning barely a tenth of spam makes it to the content filtering stage which looks for keywords.

There are also some cultural changes in the tactics of spammers. Microsoft broke down the subjects of spam mails for the first and second half of the year. The biggest rises were among general product advertising and pharmaceutical products, while there were sharp falls in the proportion of spams dealing with sexual performance drugs and stock tips.

The stock tips drop is likely down to the economy and a widespread lack of confidence in even ‘hot tip’ investments. The sexual performance drop (so to speak) may be misleading as there has been a large rise in the number of spams which come in the form of an image and thus the wording can’t easily be scanned.

5 Responses to Only one in 40 e-mails is NOT spam

  1. I keep here all of these crazy stats about spam/email percentages. I just don't see it. My real inbox and junk mail box just don't bear it out. Is my ISP or email provider filtering it out?

  2. @VitaminCM – Yeah, I don't see it either. I'm on some mailing lists, so that may skew it a bit. And I'm only talking about my active accounts. Not that I've been getting that much spam in my hotmail and Yahoo accounts either, currently. Although my one gmail account forwards to my active gmail account, without the spam, and that one for some reason gets lots of spam, even though it was never active. I think one of the people that I did use it for managed to get my email on a spamming list however.

  3. To clarify, these figures refer to the spam messages which are filtered out before they ever get to the customer.

  4. Yet more evidence that the entire communication method is broken.

    I barely pay attention to my email anymore. Those that want to contact me have my phone number. They can text as much as they like. Though I do draw the line at text message forwards, because I see those as a sign that text messaging may be following email and inevitably be a bunch of ppl circulating a bunch of useless junk around.

  5. People's opinion of spam is amazing.

    I had one of our sales agents asking if it was possible to buy "one of those lists of people's emails."

    "You mean spam lists?"



    "Its a good way of getting the company name out there."

    "Wait. You want us to send spam to millions of people. You think that will encourage people to buy our stuff?"




    "No. Really, honest to God, no. You… I can't even… just… no."

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.