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If it is via webmail in the browser (or a 'browser based' app) look for account setting to only use https. Look at the devices - how are they accessing the email?
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You can 'live boot' the Mac from a Kali USB stick if you don't want to install it but it is another few hundred things to learn ! had some wifi & wireshark tutorials that will be going out of date, but possibly relevant to a newbie 🙂 They have all the correct tools built in with many tutorials all over the net. Kali Linux or another 'penetration testing' Linux distro. The Mac OS isn't really designed for this & I think you would be better off selecting the right tool for the job, e.g. It all sounds a little dubious, but not necessarily illegal provided you own the devices, network & everyone using the network knows this is happening too. There are systems in place that prevent you seeing passwords in plain text (like https which should be used for any sensitive data nowadays).
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The ones used to connect to the network? Or ones sent over the wifi to services like iCloud or other websites?īoth need a different approach & there is every possibility you cannot find them without having to 'intervene' on the clients.
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