What is Exchange Online Protection?

Exchange Online Protection (EOP) is a cloud-based email filtering service that helps protect organizations against spam, malware, phishing attacks, and other email-borne threats. It is commonly used to provide a first line of defense for incoming and outgoing email, helping to ensure that only legitimate messages reach users' inboxes. EOP is included with Exchange Online and some Microsoft 365 subscriptions, but can also be purchased as a standalone service.