How to Block list a Domain in Office 365MxClourProJuly 10, 2020OFFICE 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 Previous Post How to Block list an email address in Office 365 Next Post How to Block an IP in Office 365
