4 votes1 comment · Office 365 Security & Compliance » Advanced Security Management · Flag idea as inappropriate… · Admin →
this is not really an idea, just a "to let you know"Paul Siwek shared this idea ·
554 votes26 comments · Office 365 Security & Compliance » Spam & Phishing · Flag idea as inappropriate… · Admin →
ATP does not consider mails from other Office 365 tenants, or even mailboxes inside of your tenant, as safe. The best way to put a stop to this is to follow the recommendations in SecureScore for your tenant; and report phishing mails to us promptly. Also, make sure that the sender is not allowed either by the tenant configuration or the user safelist.
Any Response from this @Microsoft ? it's been 2 months since your last update, in which you didnt even specify what other information you required !!Paul Siwek supported this idea ·
We too have had issues in the last month whereby students and staff accounts have been sending out spam, we only noticed because they would eventually come and say there account had been blocked for sending to much spam.
We sent out an email forcing all users affected by the Edmodo Hack to change their passwords, and I put a rule in place to only allow outbound message if the origin was a domain within our tenant, so far that seems to be working, apart from some of those that have ignored our emails to change their password.