I am surprised you do not properly handle two types of SPAM:
a) Typical SPAM that ends up in your SPAM folder, including ****, fake billing notices, etc. You would most likely be receiving large quantities of these. These should be blocked entirely, never arriving in a users SPAM folder. Instead you deliver them to the users SPAM folder. Why ?
b) SPAM that contains calendar invites (.ics files). Mail is tagging these as SPAM, but they STILL create a calendar entry, so my phone notifies me of these "appointments" even though I never saw them in my inbox and certainly don't want to have a calendar entry for them. Calendar SPAM has been a problem since at least 2019 -- can you not stop these ??