The first sign that something’s wrong is almost always the same. Friends and business contacts complain that they’re receiving mail with advertisements from you. Dozens of notifications from mailer daemons accumulate in your inbox, claiming that your mail cannot be delivered. Either the addresses of the recipients were misspelled or they did not exist. Or perhaps you received a message from your mail provider saying that someone has changed your personal data.
Now your alarm bells should be ringing, as it’s possible that your mail account. A Trojan virus that spied on the access data to your account and sent it to a criminal hacker via the internet, or a hardware keylogger on the USB port that records your keystrokes and mouse movements—one of these may be responsible.
