On 17/08/2022 07:34, badt wrote:
Hey,
I'm looking for a way to enable my existing Postfix/Mailman mailing
list server
with HF capability- to both send, and receive PGP-signed, or encrypted
email
over radio reliably, as well as have the option to have some
transmissions
either re-transmitted over the Internet.
Apparently there's Winlink[1] and it's what the Americans use, however
it seems
if not proprietary, then heavily locked while I'm looking for a Free
software
solution, preferably over GNU Radio and affordable SDR such as LimeSDR[2]
which is what I'm trying to master at the moment. Unfortunately, I
couldn't as
much as find a reference protocol, anything, really- to suggest how I
would
typically approach this- what bands, modes, encodings are used to
transmit
email over the radio.
Are there any existing GNU Radio-operated email servers and/or
networks I could
use for reference and future collaboration? I'm heavily invested in
the idea of
hardening my email infrastructure in case of an emergency, and if
Internet goes
down in my country, I still wish that my server would remain operation
over the
radio.
Curious what spectrum you plan to use for this, given that, as far as I
was aware, you cannot use amateur radio for encrypted comms. Is there
some HF spectrum readily available for such purposes?
Regards,
Andrew