On Sep 6, 9:24 am, Justin C wrote:
....
I looked at Sailmail, looks complicated, and what sort of range do you
get? ...

From time to time HF radio signals travel right around the world. In
practice sailmail and winlink have worldwide coverage and with voice
nets with relays it is unusual to drop a boat with working gear during
a scheduled net. I would be nice if the guy who gives us the airmail
software would port it to *nix but since he does the work for free in
his spare time it is hard to complain.

-- Tom.