I'm sure by now you've heard about the Google Docs phishing scam that spread like wildfire yesterday. If you happen to get an email from someone asking you to open a Google Doc they want to share with you, make sure it's legitimate before opening it. If you do happen to open it, it will send it to everyone in your address book. You do not have to have a Gmail account for this to happen. Below are a couple of links that will provide information on this phishing email. If you have mistakenly opened an email, the best thing you can do is change your password.
https://www.theverge.com/2017/5/3/15534768/google-docs-phishing-attack-s...
https://www.wired.com/2017/05/dont-open-google-doc-unless-youre-positive...