Earlier quoted context omitted.
Can you provide a citation for that? It seems to be like it would be impossible to show proof that such an email was received[1], which I imagine is necessary to declare the subpoena served in a court of law. We do have some other means for sending things like that through the internet (mostly used by lawyers and courts), but I find it hard to believe that merely sending an email without (at the very least) prior con…
There's no need to prove that the subpoena was delivered unless the recipient claims otherwise. Email is regularly used to deliver subpoenas (in fact, it's probably the most common way to deliver them). Quick google found several public examples of such subpoenas, like https://cock.li/transparency/2015-12-15-subpoena/00-2015-12-... And in any case, if the recipient fraudulently claimed that they had not received the…
> In order for your subpoena / order to be processed, it must be sent to my lawyer. Do not send subpoenas to vc@cock.li or abuse@cock.li. Instead, E-mail or call me to request my lawyer's contact information.
It makes sense to have an established point of contact (which might be an email address) for LEAs if you're something like an ISP which regularly receives subpoenas. I'm more curious about subpoenas sent to individuals via email without any prior LEA contact.
It's also worth noting that the burden of proof for something like this is, at least in my country, on the sender's end, which is why all court communication is sent by registered post.