E-mail discussion

Anyone can create a fictitious d-emails thread with the names of other company employees or representatives. This is an easy way for the attacker to make the e-mail more legitimate. Don't blindly trust emails, as anything in them can be made up.

Money

Money-related topics often involve strong emotions. Whether it's free money or your money, it's best to assume that you are interested.

File types of malicious attachments

Be very careful when you receive any of these file types: .zip, .doc, .xls, .pdf, .7z. These are the most common file types used to spread malicious attachments.