[masraum]

Originally Posted by id10t

Find a poorly secured mail server and telnet to port 25 from a public/open connection and send mail old school style

This would do it. I'm not sure that it's legal. If there's no logon banner announcing that the server is only for authorized users, then it may be fine.

Short of that, I'd be concerned about any electronic means, because there's always the possibility of a "paper trail". Email servers can have logs that would be traceable.

Certain vendors may advise that they are anonymous, but I personally wouldn't trust that. If someone came to them with a court order or subpoena, I think the information would be available.

I'm not familiar with Proton mail. But like I said, anything electronic could easily have full logs.