] As an attorney, practicing in the areas of international
] business and immigration law, it has come to my attention through
] discussions with other attorneys, that DHS is pulling aside "selected" aliens
] at entry checkpoints and bringing them into a separate room which contains a
] DHS computer connected to the internet. The aliens are told to bring
] up their various email accounts on the screen and enter their passwords.
] DHS then reads the emails for information pertaining to possible
] unauthorized work or other matters and questions the aliens on these findings.

Unfortunately, the way this accusation was offered makes it difficult to verify. However, if true, its legal. You have no rights outside the U.S. border. Random drug searches of U.S. Citizens reentering the country already occur. Being an alien makes matters even worse. Whether it ought to be legal is another matter. I think that whether or not this is true, its an example of why the idea that rights only exist inside the border is problematic.