I have been getting emails in my ntlworld account saying that my McAffee anti-virus account is about to expire. This looks like a scam - I have never had such an account and the source of the messages looks suspicious.
It is spam. Look at the numerous threads on this forum about spam and you will see there has been a recent outbreak of 'McAfee' renewal e-mails scams. There seems no answer to stopping it and VM monitors tell you to adjust your filters in webmail. Unfortunately, they don't work very efficiently.