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The unauthenticated sender '?' comes to Outlook

Update: This blog post is being deprecated and information is being moved to Identify suspicious messages in and Outlook on the web


About a year ago, in Office 365, we released the feature that - similar to Gmail - Outlook Web Access stamps a '?' in the sender photo when the message is not authenticated with either SPF or DKIM.

Well, I was pleasantly surprised to see this morning it's also in Outlook (for Windows, not sure about other clients):

This is great to see, we're now managed to unify the behavior between both Outlook and Outlook Web Access, at least in Office 365.


11/1/2018 - Clarification: this feature is actually still in Preview.