Informational hygiene

I seem to have been infected with an emailing virus on my laptop (klez.H) which I noticed this morning because it tried to email loads of the people who send me junk mail and got bounce messages back. Despite my usual care with Outlook, this one seems to have slipped through the net. I've updated my anti-virus software and am removing the bugger now, but if you've received email from me in the past month, you should probably do the same - apologies!

Honestly, you would think I would know better, wouldn't you. When we switched anti-virus companies at work I didn't get round to installing the new one on my laptop and just let the definition file on the old one get out of date. That'll teach me.

Intrusion alert!

OK, it's much worse than I thought. Someone else is sending out a ton of spam email purporting to come from my domain. It seems to be the style of spam that I've been getting recently (prescription meds stuff) so I assume that's where they found the domain name. Now the question is, how do I get them to fuck the hell off and stop doing it? I figured out that it's not being sent from my computer because after disinfecting it, I shut it down for a bit as a test and logged onto my email using webmail and my office computer. And I've just received another bounce message stating the original mail was received at 9:06 EST (i.e. 14:06 GMT). While my laptop was turned off, and had been for a good hour. On the plus side this means that I can turn the laptop back on, reassured that it's completely clean of mail sending crap but on the minus side, what the hell do I do about this?