At this link: http://www.co.boulder.co.us/da/dl/E-mails%20scanned.pdf, which is a record of emails between Michael Tracey and John Mark Karr as well as several investigators on the JR case, I find that page 66 is rather interesting.

It seems that a FREE Hushmail account might be safer to have than a premium account! In any event, I always find such trivial information as this useful to file away. I thought some other members here might like this trivia tidbit as well.
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(From the PDF)

"I spoke with the Hushmail lawyer, Steve YOUNGMAN, yesterday. FYI, the best contact number for YOUNGMAN is 604-893-8699.

With respect to the account in question, YOUNGMAN advised the following:
1. The account is active (created Sept. 2005)
2. The account is non-premium (free; basic service)
3. No IP address logs are available, to date.

YOUNGMAN also advised me of the following:
A. There is no user registration information available for the account, as it is not a 'premium' account.
B. IP Addresses could be logged, with the appropriate judicial authorization.
C. A significant amount of e-mail message content exists, with the most recent message having been sent on the day of my enquiry (May 17, 2006.)

YOUNGMAN has taken a 'snapshot' of the data associated to the suspect account, thereby preserving/archiving it until such time there is a COURT ORDER to release that data to law enforcement.

Unless there is a Canadian connection to your homicide (besides the fact that the Hushmail servers are located there), you will have to pursue an MLAT. I wish I could do something to expedite your requiest, however, without a crime having been committed in Canada, I would not be able to back a US-authorized search warrant. "