How to Block list a Domain in Office 365
Steps to Block list a Domain in Office 365 Open https://outlook.office365.com/ecp/ Protection -> Spam filter -> Default -> Block lists ->Add the sender domain under Domain block list -> Ok ->Save
Steps to Block list a Domain in Office 365 Open https://outlook.office365.com/ecp/ Protection -> Spam filter -> Default -> Block lists ->Add the sender domain under Domain block list -> Ok ->Save