Through Office 365, Microsoft provides multiple spam filters so your email is protected from the moment you receive your first message. In order to help prevent spam in Office 365, you may want to change a protection setting to deal with a specific issue in your organization—say you’re receiving a lot of spam from a particular sender, for example – or to simply fine tune your settings so that they’re tailored to best meet the needs of your organization. To do this, you can change anti-spam settings in the Office 365 Security & Compliance Center.
Spam protection keeps you from receiving malicious emails, making your email browsing a safe and enjoyable experience.
You can access this service by logging in to your Office 365 account, going to settings.
More information can be found by clicking here.