PSKMail as Emergency HF Email.
PSKMail has been around for a while, and is now getting more organized and exciting.
The UI software can be downloaded on Windows.
Several radio message servers in North America can be contacted via HF USB.
The digital modes used are all in the popular FLDigi software which acts as the virtual TNC for PSKMail. PSK250 is the default mode in the USA, but the server will adjust the mode according to the propagation conditions.
Like Outlook Express, PSKMail will display and send your email and small attachments to and from your chosen regular email account.
For more information go to http://pskmail.wikispaces.com/