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 transmissionseither 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 softwaresolution, 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 transmitemail 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 theradio.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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