Communications within the United States requires a search warrant to examine.
The above is not negotiable, not waived away by technology or will, and is simply stating our natural rights which we went back and then shackled our government into observing. The 4th is merely an expression of that natural right, not the creation of it.
It would be best if our employees in the government fully understood this most basic concept. Otherwise, I see no other future where natural rights are once again restored.
I say they still can't. Unlike the USPS, the internet is designed to do whatever it takes to get that email from Point A to Point B. A USPS truck in North Dakota would never take a detour through Canada, but the internet might move your email through a server in Canada, for example, whether your email provider has a server there or not.
I offer Canada as a placeholder for any of a number of possible foreign countries, not as a single exception that would need to be addressed.