How to filter specific domains in Roundcube?

Question

Roundcube

Good afternoon!
Tell me how to write a filtering condition in Roundcube in Settings - Filters.
I want to filter all messages with the .br domain, for example [email protected]
I write in the filter field the transfer of all letters from .br to a folder, but there are recipients who contain the string br in their mail name, for example [email protected] and it turns out that such letters also fall under the rule. Maybe somehow you can write a condition so that it filters exactly the last part of the mail, which contains the .br domain?
In general, I did not find a description of the filtering language in Roundcube on the Internet.