Hello, I apologize in advance if I have included the topic in the wrong topic. Following the instructions I installed rspamd instead of amavisd-new. The problem is I get "sophisticated" spam. Where an email is reported as a newsletter and includes a report link. However, this link does not work anywhere and only refers to a static page. Emails also come from different domains each time. If such an email is in English, rspamd can reliably filter it out. However, if it is in my language, it will evaluate it positively. Amavisd-new was able to filter these emails in my language as well. Is there anything I can do to make spam filtering work properly?
Contact the rspamd developer and ask him. Beside that, rspamd is a learning filter, so it gets better by the time and in general, the detection rate of rspamd is way higher then the one of amavisd, but this does not mean that there can not be a specific mail that amavis catches and rspamd does not catch. But nobody forces you to use rspamd, keep using amavisd if you are happy with that.
Thank you for answer. My problem why rspamd badly filtered spam was because I didn't have Unbound installed on the mail server.