Fix the issue To make sure that Office 365 filters messages like this in the future, you need to remove the address from ...

Office 365


Fix the issue
To make sure that Office 365 filters messages like this in the future, you need to remove the address from your organization�s sender allow list.
To modify this list, go to the spam filter page (opens in new window).
Choose your spam filter, choose Edit, and scroll down to the  Sender allow list, choose Remove, remove the sender's email address or domain, and then save your changes. 
Wait 15 minutes before making sure that your change was successful.

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