There is an email going around with the return address motorsport-uk and the subject 'meeting postponed'. Don't open it or anything similar. The attachment is a virus.
Also if you get a message that appears to me from your mail system with a subject "undeliverable mail" be very careful. My anti-virus software intercepted two of those. I hadn't sent any emails to those addresses. It is a diabolical way of getting you to open the message because you think one of your own messages wasn't delivered.
Please be very careful.