Is there such a mail collector?

Question

Mail server

There are several postal addresses, each address has its own user. Each user on a separate PC through the client (TheBat or Thunderbird) pulls mail. There is a lot of spam and viruses in the mail.
Task:
First collect mail in one place, filter it, it's all under Windows. Collect it so that different users from different mail clients can pick it up from local folders.

Answer 1

There is. It is called a corporate mail server.

Answer 2

Can you create corp boxes in connect.yandex.ru?
It's free and everyone will have a normal mailbox with normal spam and antivirus systems?
What you have is up to the first mistake of the client, which will ruin your entire database with all letters.
If you don’t want yandex or other cloud systems, you can deploy your own server, for example, there is Zimbra Collaboration Open Source, for the first time it’s enough