Today, I receive lot of bounces for mail I never sent, that contain viruses. Apparently some **** in Spain (51.Red-81-38-96.pooles.rima-tde.net) has a virus on his Windows PC.

Do yourself a favor. Never use again Outlook Express or Outlook, and if you can avoid using Windows, that would be even better. These 2 3e-mail" programs are the widest virus spreader ever made. Use Thunderbird or any other available alternatives.