When it comes to using email, there are several "fears". We fear our accounts being hacked, we fear others seeing confidential content, we fear falling prey to (viruses), we fear being scammed, we fear... Therefore, we try every possible way to protect our emails. For instance, prohibiting the reading of attachments, filtering out irrelevant strangers, or simply modifying the registry. In short, we use every trick in the book. However, the results are not very effective, and it seems that the firewall in our computer is also helpless against emails. Often, instead of preventing fires, it invites them, allowing viruses to exploit loopholes.