Since update to 10.39 one of my clients has been receiving an email from the "Message Filter Agent"
Here is the header:
Message-ID: <16457CD0737B4E03A1B83E6E3DA44E82.MAI@mailserverdomain>
From: "Message Filter Agent" <mailserveremailaddress>
To: <clientemail>
Subject: Message Filter Notification: Scanner Emails
Date: Wed, 27 Apr 2022 12:08:29 -0500
X-MEFilter: 1
Precedence: bulk
Auto-Submitted: auto-replied
X-ME-Bayesian: 0.000000
Return-Path: <>
X-Read: 1
Where is this coming from?