Blended threats. Payload viruses. Spam. If you're one of the more than 15 million people whose work email is protected by Postini's email security products, we hope you don't spend a lot of time thinking about these things. And if we're doing our job right, they certainly shouldn't be showing up in your inboxes. But we process more than 3 billion business emails per day for our customers, culling the spam, viruses, and other threats out, so we do think about this stuff. A lot.

On occasion, we like to share some of what we've learned, so that those of you who are interested can see what spammers are up to. If you're one of those people, head over to our Enterprise Blog for an update on spam trends over the past few months.