users can define a policy to change the category of an incoming mail, so that all mails of one user/domain will be shown in the mailbox in a different color and highlited.

I need this policy for the whole system. The incoming mails of one sender domain should be shown highlited (different color or something else) in every mailbox.

I don't want to create this user policy in every of our 1000 mailboxes :-)

Are there any possibilities to create this policy for the whole domain or postoffice !?

Thanks and regards,
D. Oeden