In Microsoft 365 organizations with mailboxes in Exchange Online, users can report phishing and suspicious email in Outlook. Users can report false positives (good email that was blocked or sent to their Junk Email folder) and false negatives (unwanted email or phishing that was delivered to their Inbox) from Outlook on all platforms using free tools from Microsoft.

Microsoft provides the built-in Report button in supported versions of Outlook on virtually all Outlook platforms for users to report good and bad messages.

Would like a feature like this for Missive.