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Stop Microsoft users sending 'reactions' to email by adding a postfix header
Over the past few months, I’ve noticed that an increasing number of replies to email that I’ve sent are “reactions”.
I imagine that, to the sender, or to someone in the Microsoft ecosystem, they are handled a bit liked a “thumbs-up” or “heart” reaction to a Signal message. My understanding is that, if that header is set, Microsoft suppresses the ability in its clients to respond with a reaction. That doesn’t feel like an ideal user experience (even if, for me, it achieves the goal of not getting a reaction email).
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