The purpose is for writing an article on E2EE but I want to suggest clients that will alert on MitM tampering in a manor the person using the client can not accidentally ignore it. i.e. just click through a warning
On the server side eJabberd and Prosody appear to be the only server daemons supporting XEP-0474 but I just can't find a definitive list of supported clients even if they are in the experimental phase. One may wish to experiment.
[1] - https://news.ycombinator.com/item?id=37955264
[2] - https://xmpp.org/extensions/xep-0474.html
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