Just throwing it out there, but GLP was busted. Who's to say that he didn't cooperate and give his password (and therefore key) to the DEA who used that and MLAT to read all emails that were sent to/from his account? In that manner, the DEA could subpoena the encrypted email transactions and used the keys they got from GLP's email addy to decrypt them. So they may not have the ability to get every hushmail they want decrypted, only the emails to which they got a password to get into. Honestly not a computer guru, but anyone who is could let me know if the above holds water.