Train Bayes

How do I train Bayes as to what is SPAM and what is not? It's producing so many false positives that it may make more sense to just turn it off.
Yes - we recommend disabling Bayes for a while now - if you get many false positives - I'd recommend to check our Getting Started page in the wiki (and all pages linked from there):
https://pmg.proxmox.com/wiki/Getting_started_with_Proxmox_Mail_Gateway

The recommendations there should help you get a setup which works well in most cases.

I hope this helps!