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
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