SpamExperts operate with a very high accuracy, this ensures that only legitimate emails go through but at the same time that the filter doesn't actually block legitimate emails unless something on the sending server isn't configured as it should.
In case most of your incoming email goes to spam are often due to if you're redirecting other email accounts outside your domain or hosting account towards your domain. This on a lot of mail servers rewrites the sender, which as a result will cause a lot of the filtering technologies to see the email as spam, most likely due to invalid SPF or DMARC records.
