So I've been trying for the last two weeks to get a new mailman3 server running on a virtualized server (any server), and I'm turning to this list after having failed many times and running out of holiday time.
I started trying a non-docker installation on Ubuntu 18.04 (https://docs.google.com/document/d/1xIcSsoNFp2nHi7r4eQys00s9a0k2sHhu1V5Plant...) , which got me the closest. Except I had a problem with inbound email only being triggered when it came from certain accounts. But that clearly wasn't good enough for production, so after many attempts to figure out where it was failing, I decided to turn to docker as a solution that should be cleaner.
A few attempts at doing a docker installation on digitalocean.com failed, which I realized might be due to it not routing private IP addresses, so I moved to AWS after checking that their VPC policy would fit mailman's docker requirements. I found a great but slightly outdated guide on how to do this (https://xiaoxing.us/2018/01/01/deploy-mailman-3-on-aws-using-docker/). By this point I knew enough to correct a number of places where the environment had changed since the procedure was written, but postorius still failed at the curl test.
The challenge for me has been the difficulty to know how to troubleshoot the different different systems and network infrastructure that are used to keep mailman3 humming. I've tried about 7 different installation walkthroughs (there are no recent ones on Youtube by the way, in case anyone wants to seize that opportunity!), and the good guides provide ways to check each stage to try to help you a bit on that front.
Nonetheless, I feel stuck and thought I'd ask the simple question... for a completely basic, barebones new installation, what's the easiest way to get a mailman3 installation up-and running? (e.g. Which server provider? Which operating system and version? Docker or otherwise?)
Any pointers highly appreciated. Google Groups is clearly on its way out, as it no longer allows for people to easily join groups by sending an email or clicking a link, so that should be a big opportunity for mailman3 to step up and help give those mailing list migrants a new home... which is what we're looking for. We're just not quite as smart as you guys. ;-)