user mail-sending limit policy

I want to set a user mail-sending limit policy. If a user sends more than 25 email messages within 1 hour, the user account should be blocked automatically. The user must then contact the Mail Admin to unblock the account.

I think that the documentation for the policy is at Defining Send / Receive Restrictions for an Account | Axigen Documentation. I don’t know about a message informing the user to contact the admin.

Thanks for sharing update @Trekkie