Firstly, I'd like to apologise to anyone who is visiting this site purely because they have received a strange email from my domain. It wasn't me, I promise.
Due to a large cock-up on my part it would seem that there was an account on my server with a weak password, this was exploited last night, and someone managed to send almost 1 million emails (as far as I can gather) before being booted off this morning.
I think I'm all secured now, so hopefully this won't happen in the future, and now I get to begin hunting around for anything that the intruders may have left behind (oh the joy).
Once again, apologies to anyone affected by any of these emails. I'll try to make sure nothing like this happens again.