SMTP no Policy_name none Sophos XG too many spams

Hello Community.

Sophos XG Firewall Firmware Version 18.5.3.

We have too many of False Positive, and false negatives.

The quality of Spam filtering is very poor. It is letting too many stupid emails go through.

Checking the Logs, there are random email without any check getting out.

It is on a very random base and I am not able to find any connection.

If someone has an idea??

Thanx