How to block emails from specific addresses in a google mail group?

Question

Google Workspace

There is a domain mydomain.ru. Google mail is attached to it. "Groups" have been created - common addresses of the form [email protected], [email protected] All this is configured in https://admin.google.com .
Anyone can write to shared addresses from any address, including an external one that has nothing to do with the domain.
Letters are forwarded to several recipients, the list of which is specified by the administrator.

Problem: someone (let it be [email protected]) sends spam to [email protected]

How to block emails sent to a general address specifically from [email protected], without closing the possibility of receiving e-mails sent from any address (except [email protected])? In short, we need a blacklist, is there such a possibility?

Rummaged everything in the settings in admin.google.com, did not find it.

Google account is free, no corporate fees. I would like to understand if the absence of a blacklist is a limitation for free accounts, and if you pay money, the necessary settings will appear? Or is there no such functionality?

Answer 1

No filtering affects the "distribution group", because It's not a mailbox per se. Filters according to the rules are created individually in the mailbox by the users that are included in this distribution group.

Answer 2

Try setting up Quarantine: https://support.google.com/a/answer/6104172?hl=en