I notice that spam seems to come in waves. You seem to get one email followed in the next few days and weeks by thousands of similar ones. The latest wave seems to be these emails that try to convince you there is a parcel waiting for you at customs, such as the email below. I'm currently receiving around a hundred of these every day. I can't help wondering whether anyone actually believes that they do have a parcel to collect and responds to the email.

Dear Sirs,

We have received a parcel for you, sent from France on July 9. Please fill out the customs declaration attached to this message and send it to us by mail or fax. The address and the fax number are at the bottom of the declaration form.

Kind regards,

Your Customs Service