Tiny quibble but in Step 3 I'm hovering over what app type to create because the names don't quite match "Apache PHP 8.1 app" -- I'm going with PHP-FPM with Apache.
Other "for dummies" notes/questions:
- Setting up site: yes to Let's Encrypt, but should I be turning on Encrypt All Traffic and Route all traffic (...)? (saying no)
- Should External Access be toggled on when setting up the PostgreSQL User? (saying no)
- My first login (step 18) was unsuccessful ("Internal Error"), then I double checked all the Step 12-14 config stuff, and hit the "Initialize" button under the "Check DB Config" section (which was showing an error), and now I get a login page at the newly created mail server domain, but an "Invalid request! No data was saved" error when I try to enter my mail login password.
In the Test config section of the installer, I can send SMTP mail (OK displayed, and email arrives), but the "Check login" button on the Test IMAP config section doesn't do anything (no displayed results, positive or negative).
After running the successful SMTP test and the unproductive IMAP test, the mailserver installer page at [domain.com]/installer/index.php just started giving me a 503 Service Unavailable error.