Spam Filtering is terrible, I’m seeing literally a 50% false positive rate.
It seems there is no way to Disable it completely.
The wiki says [quote]“Once you enable spam filtering on a domain, you cannot reverse this action.”
Apparently, you can prevent the messages from being moved but you can’t actually disable the filtering fully???
See https://help.dreamhost.com/hc/en-us/articles/215686647-Technical-details-on-how-Anti-spam-filters-work which says
If you uncheck ‘Filter spam messages’, your email will no longer be filtered into the /Spam folder. However, this does NOT disable Vade filtering. It just prevents the email from going to /Spam. It will be sent to the inbox instead.