I got this in my inbox on the forums yesterday
Your computer was noticed in email spam. It is quite possible that it is a part of botnet (http://en.wikipedia.org/wiki/Botnet). Strongly recommend you to scan your computer for malware. You can do it online, for example, at:
Please, follow this. Otherwise I have to send abuse mail to your ISP with all the ensuing consequences.
Thank you, Joan Davis.
JoannyDavis is not possible to send PMs to, so I'll answer the PM here.
Replies
Secondly, http://boards.polycount.net/showthread.php?t=69906
That is all.