You have to be careful if you receive an email that is from an unknown sender or the sender got a strange email address.
Unsolicited bulk email are referred to as email spam or just spam. These email are sent to a large number of recipients and often contain advertising. Recipients are selected at random without any existing business relationship or giving consent to the sender.
You can receive spam email that are not addressed to you, but to another recipient. The actual recipients of email are not necessarily visible in the recipient line. This is the case if your address was entered in the Blind Carbon Copy (BCC) field. If that is the case, your email address is not displayed. Bulk email senders, generally senders of unsolicited advertising email, often use this feature by entering only a pseudo-address in the email. The email is actually sent to hundreds of recipients.
There is a special form of spam called phishing. A phishing email is a fake email from a company or authority asking you to click a link and log in with your account data. The link takes you to a website, which is also fake, and any data you enter there is recorded by the attacker. If you receive a phishing email and want to inform us, use the contact form for reporting phishing pages.