No, it's just a warning that your client can't prove that the message was really sent by that sender. These will eventually go away once https://github.com/mat

No, it's just a warning that your client can't prove that the message was really sent by that sender. These will eventually go away once https://github.com/matrix-org/matrix-spec-proposals/pull/4048 https://github.com/matrix-org/matrix-spec-proposals/pull/404... lands.