Thank you, integration with activitypub is what i was after!

Software:

• firewall, no inbound and do outbound restrictions
• use immutable OS
• full disk encryption (keep in mind that in many setups you will need to be beside the computer after restart)

Hardware:

• put it in the trusted datacenter (home stuff is not safe from teenagers and people that need computer’s electrical socket for a vacuum cleaner)

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:

• SearxNG is a meta search engine, can aggregate search results from a ton of other search engines (like DDG, Google, Bing, … and a lot more)
• Whoogle, looks like a proxy to Google

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).