Business rule and email domain

Business rule and email domain

Good afternoon. Tell me please, how to create a business rule so that all incoming emails from outside domain (for example @mydomain.com) to SDP request are automatically assigned to the site my_site_name?

I create a new business rule. Criterion:
criterion: sender
condition: contains
sender: @mydomain.com, mydomain.com

Actions:
select action: put into group
put in group: select
group list: my_site_name

Don't work (
Thx.

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