Software:
Hardware:
How about jitsi? https://github.com/jitsi/docker-jitsi-meet I am running it for years, works much better than Facebook Messenger that is for sure 😃 not sure what you mean about the "all the standards"
What are you talking about? What nonfree programs? Can you give an example? Btw, for VPS you normally just need ssh, and that is free and even OSS.
I haven’t used it, but here is my first web search result: https://github.com/droberson/ssh-honeypot Also: https://github.com/paralax/awesome-honeypots
Indeed, well:
Hey, I do not think that this is off topic at all. My instance is matejc.com
Btw, I do not use postfix
if you use starttls, just use tls_type: "starttls"
in your config
My instance had the same problem, the problem was that Hetzner (where I host my server) by default is not permitting outbound smtp ports. For me the solution was to use alternative port and even that a starttls alternative port which AWS SES luckily supports (that is what I am using for smtp server). Alternative would be also to just ask Hetzner to unblock the port (people have reported success with this method).
Thank you, integration with activitypub is what i was after!