ROFL
And, technically, everything said above is absolute correct bur the feds have access to your encrypted E-mail via encryption breaking technology and need not go through legal mechanisms to read what you are typing.
The legal requirements mentioned above are only a technicality that they feds must comply with under the US Constitution to have he E-mail admissible in court for evidential purposes. Furthermore, those requirements do not apply to foreigners because they have no rights under the Constitution.
The bottom line is that the government can, will, and does read encrypted E-mail and will continue to do so.