Howard Miller

Never.... never try to run your own email server.

It's one of those things that is VERY complicated to set up properly in the first place and then needs constant maintenance.

 

However, if you MUST, I would consider Mailcow, which is a Docker-based mail server. It's all the usual suspects and a nice web interface all wrapped up by docker-compose. But you'll still regret it

 

 

Check that your ISP (or wherever you want to host it) won't block you before you even start.

(To the OP) The sslproxy and reverseproxy only skip some sanity checks in Moodle. So, while it's not a good idea to set them to true if you don't need to, all they do is to stop an error message appearing about the wwwroot setting being wrong.

I have Redis sessions set up on my site and I definitely don't have a 'sessions' folder.

Have you checked Redis to make sure something is getting stored there?

For some reason that I have naver entirely understood, the process that deletes files marked for deletion is not immediate. In fact, "deleted" files hang around for several days. This is a big problem if you on the verge of running out of disk space.

"Moodle Moosh" (https://moosh-online.com/) provides a command to flush out the files in this status.

moosh file-delete --flush

There isn't a version of Boost Union theme listed for Moodle 4.5.

AND... https://github.com/moodle-an-hochschulen/moodle-theme_boost_union/issues/733