making a spam filter and use it for all users

Hello, we have problem with spam mails. So we try to use spam filter from roundcube. Is it ok to use a spam filter for all users? I think spam filters keeps on mysql. So if we can update mysql, every user otomatically can use the same filter.  Because we have many users and its impossible to handle this one by one. And if we update spam filter every week or month, it can help us to relax.

==== Required information ====
- iRedMail version: 0.8.4
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP
- Linux/BSD distribution name and version: Centos
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