Antispam on the mail server (linux, postfix). What to choose?

Question

linux

Good afternoon, colleagues.
There was a task to pick up the commercial decision of an antispam.
My mail server is on linux, the daemon is postfix. Therefore, I consider only what can work with postfix. I consider both installation "at home" and SaaS solutions. But transferring mail to the cloud (i.e., to servers, for example, Yandex) is not an option. Interested in a solution that works well with "Russian" spam, tk. 99% of all mail (and spam) is in Russian.
While I look narrowly at kaspersky and the doctor a web. I also got a spamorecutter, but for some reason it does not inspire confidence, because. I saw exactly the same site but with a different name and prices.
Please share your experience of using commercial anti-spam solutions. Who uses what solutions? How does it work? Personal experience and feedback.
PS: At the moment I use SA + postfix filtering (smtpd_*_restrictions) + dnsbl. It beats off about 90% of spam. During the day, 5000-8000 "spam connections" (that is, those that postfix cuts off on the way), no more than 1000 reach SA. Up to 10 messages per day break through (get into the inbox).

Answer 1

I only use dnsbl and greylisting. If you're lucky, one spam email will get through. The rest are filtered.
Without them, 100-200 letters per box. Info support boxes

Answer 2

Well, I will not ask the question what is the problem with transferring to other people's servers (Yandex or Google, as an example), it is obvious that the problem is in psychiatry.
Use SpamAssassin, educate it on a good spam database, I'm collecting mail in a box that will soon be 20 years old (created in 1997). The box at one time was lit up in all possible spam databases, spam has been falling on it all these years, plus a mail.ru box that was handed over to the spam database by Mail.Ru itself at the time when they did it. After training on these two boxes, FIG will break through.