Reply all
Reply All should never ever be the default reply option, as it currently is in the Android App.
On the contrary, clicking Reply All should render a message prompting you to confirm that you really want to send that message to everyone listed.
Of all messages I've ever received that were sent with Reply All, only a tiny fraction were relevant to me.
Reply All is the root of all evil and should never have been implemented in email services at all.
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Michael Templier
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