![]() ![]() Security/SecOps mailboxes: Dedicated mailboxes used by security teams to get unfiltered messages (both good and bad).To prevent phishing simulation messages from being filtered, see Configure third-party phishing simulations in the advanced delivery policy. Phishing simulations: Simulated attacks can help you identify vulnerable users before a real attack impacts your organization.You should only consider using overrides in the following scenarios: To put it another way: as a security service, we're acting on your behalf to prevent your users from being compromised. We also determined that the allowed sender and allowed domain lists in anti-spam policies and Safe Senders in Outlook were too broad and were causing more harm than good. Our data also indicates that the false positive rate (good messages marked as bad) for high confidence phishing messages is very low, and admins can resolve any false positives with admin submissions. Our data indicates that a user is 30 times more likely to click a malicious link in messages in the Junk Email folder versus Quarantine. This is the same approach that we've always used on malware, and now we're extending this same behavior to high confidence phishing messages. The spirit of being secure by default is: we're taking the same action on the message that you would take if you knew the message malicious, even when a configured exception would otherwise allow the message to be delivered. For more information, see Manage quarantined messages and files as an admin in EOP. By default, only admins can manage messages that are quarantined as malware or high confidence phishing, and they can also report false positives to Microsoft from there. Malware and high confidence phishing messages should be quarantined. Secure by default isn't a setting that can be turned on or off, but is the way our filtering works out of the box to keep potentially dangerous or unwanted messages out of your mailboxes. ![]() The Redirect message to email address action for high confidence phishing messages is unaffected. Anti-spam policies that use this action for high confidence phishing messages will be converted to Quarantine message. We have deprecated the Move message to Junk Email folder action for a High confidence phishing email verdict in EOP anti-spam policies. More information on these overrides can be found in Create safe sender lists. ![]() If you want to temporarily allow certain messages that are still being blocked by Microsoft, do so using admin submissions.
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