Most reports are that more than 50% of all spam is now coming from
"zombies", which typically are home computers that were infected by a virus that installs a trojan horse that the spammer has control over.
I don't know if that's an accurate figure or not, but it seems like a lot of work for a spammer that can use any of thousands easier ways to send their messages.
That is how spammers are sending out their spam these days. They started off using open relays, but as more and more people started closing open relays (and as more and more spam databases appeared that could be used to block E-mail from open relays), spammers had to find other ways. They found viruses and realized that they could install trojans on hundreds of thousands of computers, and send out much more spam than they could before. They started doing this several years ago.
Maybe there are thousands of easier ways they could be doing it, but they aren't. The experts are all agreed that the majority of spam is coming from these zombies.
Additionally as Microsoft and others continue to lock down their products this should not be much of an issue.
Hopefully so. But today that just isn't the case. Take a look at the spam you are getting, and check out the reverse DNS entries that they are coming from. You should see a lot of reverse DNS entries that you recognize as being cable/DSL lines that got infected.
-Scott
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