so i've been messing with Winlink Express for about a month now and i finally got a connection going through a local RMS gateway on 2m packet, which felt like a huge win after fighting with the soundcard config forever. but now that im actually connected and can send/receive emails i realize i dont really understand how the whole thing works under the hood and im getting confused about a few things.

first question is about the RMS gateways themselves — when i connect to one locally, is that node just acting as a relay to the CMS servers on the internet, or does it actually store messages locally too? i ask because i was reading about hybrid network stuff and it sounds like messages can sit on the gateway for a while if the internet is down, which is obviously the whole point for emcomm situations. but i cant tell from the Winlink Express interface whether my gateway is actually in hybrid mode or just a straight pass-through.

second thing is i tried switching to HF using Vara HF on 40m and i can see gateways in the list but every time i try to connect to one a few hundred miles away it either times out or i get like 3 bps and it just hangs. my antenna situation on 40m is not great (dipole in the attic) but i wasnt expecting it to be this bad. is there some trick to picking which gateway to try, or do people just scan through them until something works?

yeah the RMS gateway stores messages locally if it's running in hybrid mode, which most of them are configured to do these days. basically it'll hold your message for up to something like 72 hours (i might be slightly off on that number) and if the gateway has internet it forwards to the CMS right away, if not it waits. you can actually check what mode a specific gateway is in through the Winlink web interface, there's a gateway listing page that shows status and stuff.

on the HF side, gateway selection is kind of an art honestly. the propagation display built into Winlink Express helps a little but i mostly just look at which gateways have had recent activity in the session list. a gateway showing activity 2 minutes ago on 40m is probably going to work better than one that hasnt had a connection in 3 hours. also with an attic dipole you might genuinely just be fighting physics on 40m during certain parts of the day — i had a similar setup and found 80m actually worked better for closer regional gateways in the evenings even though that sounds backwards.

the gateway timeout thing drove me insane when i was first setting up vara hf. one thing i dont see mentioned much is that vara HF full vs the free version makes a pretty noticeable difference in marginal conditions, the free version tops out at like 700 bps i think and the paid one gets way higher throughput which matters a lot when propagation isnt cooperating. not saying you need to buy it right away but if you find yourself doing this regularly its probably worth it.

also check that your audio levels going into vara are set right, i had mine slightly too hot for a long time and it was causing all kinds of weird connection failures that looked like propagation problems but were actually just clipping on the tx audio. theres a built in ALC indicator in vara, keep it in the green.