It's a Personal Message sent by malicious user thru this forum. I'm sorry for that but currently I see no way how to prevent such actions. 
The person was banned ASAP (but not as soon as I'd want)
Is it not time to introduce a precaution to make it more difficult for people to do drive by spam of the forums and consequently forum members.
There is a thread where This forum spamming was discussed and I suggested that registration shouldn't be a single operation, fill in the form to register with a legit email address and an email is sent to that address with either an activation link or a code for them to enter to complete the registration. Until registration is complete then they can't post and they can't send PMs. No PM, no notification email.
I know this isn't an infallible system with throw away hotmail addresses, etc. but it inconveniences them if they have to get a new email once they are banned. In forming the registrant that the IP address will be noted on registration could also be a deterrent and nothing to worry about for genuine forum members.
These measures are becoming common on other forums, not sure if it is directly to combat this or for other reasons.
