I just got this reply:
If you would like for messages to ignore the Spam filtering, you can disable the Spam filte.
The only way to disable your Spam filter is by using Sieve filters: https://proton.me/support/sieve-advanced-custom-filters.
You can add the following SIEVE filter in order to ignore the spam filter completely.
In order to access this feature please follow these steps:
-Login to Proton Mail with your browser
-Go to Settings
-Navigate to Filters
-Click the “Add sieve filter” button
-Replace the existing code in the Sieve Script text box with the following:
require “fileinto”;
fileinto “Inbox”;
This is what I should turn off their spam then?
Cheers
beerich