What antispam systems should I use for MDaemon on Windows?

Question

Mail server

Hey!
The company uses MDaemon on Windows (license, everyone likes it, convenient logs), but I can't figure it out with antispam. Russian spam does not catch practically in any way.
Does anyone have experience of screwing (maybe with a separate firewall type) to anti-spam mailers?
And, if anyone has at hand, a sensible explanation of how to work with Bayes? Well, I put 300 spam and 300 non-spam in different folders, I pointed everything out to him. There is not much result, but the fear of missing the necessary letters (except for whitelists) is growing.

Answer 1

Ideally - a bit of a blacklist for completely frostbitten relays + a graylist with whitelists + optionally an antivirus.

Answer 2

You would have a good mail gateway either from Kaspersky or dr.web, and if there is no money, then Proxmox Mail Gateway (with it, the chances of missing something important are much less)