Re: Sending email over HF using Free software

[Rafael Diniz]

Hi,
You can use UUCP to integrate the email stack to HF. Gnuradio I think 
better be used for the layer 0 in the network stack. This is what I 
wrote to integrate UUCP to any HF tnc (ardop and Vara supported for now):
https://github.com/Rhizomatica/hermes-net/tree/main/uucpd

Cheers,
Rafael

On 8/17/22 10:57, Andrew Back wrote:
> 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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