so ive been messing with Winlink Express for about three weeks now and i finally got a connection to go through last night, felt pretty good. im running an IC-7300 into a SignaLink USB and using VARA HF which after about two hours of level adjusting actually seems to work pretty well. my question is more about the gateway side of things.

when i open up the channel selector it gives me this list of RMS gateways sorted by distance and signal reports and i genuinely dont understand how to pick the right one. like is closer always better? i connected to one about 200 miles away last night and it worked fine but there was one 40 miles away that kept timing out. does the propagation to the gateway matter the same way it does for regular contacts or is there something else going on with how Winlink routes stuff once it gets to the RMS end?

also kind of confused about the whole Winlink vs CMS thing. i get that messages go from my radio to an RMS gateway and then somehow end up at the CMS in the cloud but what actually happens if i send an email to like a regular gmail address, does it just go out as normal email from there or is there some delay or filtering thing happening. trying to set this up for our ARES group and want to make sure i actually understand it before i try to explain it to anyone else.

yeah the gateway thing trips everyone up at first. closer isnt always better because you still need a decent signal path to the RMS station, its HF so all the usual propagation stuff applies. that station 40 miles away was probably on a band or frequency that just wasnt working well for that distance at that time, classic skip zone type issue. the channel selector score takes into account recent successful connects from other users so a higher scoring gateway further away can actually be a much better bet.

on the CMS question -- once your message hits any RMS gateway it gets forwarded to the Winlink CMS servers over the internet on the gateway operators end, you dont have to worry about that part. from there if youre sending to a regular email address it just goes out like normal internet email, theres usually maybe a minute or two of handling time but nothing crazy. the main thing to watch for with ARES use is that Winlink messages to and from internet email addresses can sometimes get flagged as spam depending on the receiving server, so its worth doing a test with your actual group members email addresses before you count on it in a real activation.

VARA HF is the right call by the way, makes a huge difference over plain Winlink PACTOR if you dont have the hardware modem.

just went through this same learning curve a couple months ago. one thing that helped me was using the Winlink map on their website to look at which gateways near me were actually active recently vs just listed, some of those entries are pretty stale. also if youre doing this for ARES you might want to look at whether your section has any dedicated gateways set up specifically for emcomm use, some do and theres usually a nets or a contact who can tell you which ones are being maintained.

the SignaLink and 7300 combo works well once the levels are dialed in, i run almost the exact same setup on 40 meters and it pretty reliably connects first or second try now.