I think whatever may need is some details on your VPS configuration. Cpu, ram, disk space and ziS ie Ubuntu LTS 24
When you say you tested mail. Did you use the discourse test and receive an email?
In my XP in your app.yml file you should have 3 lines of main config for the SMPT.
- Username:
- Password
- PORT
Now from what you said you had this working in an earlier discourse install?
As mentioned “Tests-Passed” is the recommended version to install. Stable is from my understanding more for ppl with custom plugins & themes - which could require updating more often to avoid breakage.
Can you share a rebuild log with errors? Remember to scroll up when capturing log as final error is just a failed result. You can always redact sensitive data like SMPT user and password type details.
There are also some topics on email SMPT issues that may have solutions