When emails from MPmail matches a compliance filter rule, it tags as clean, and isn't scanned for threats. This article will cover how to add a warning banner to notify the recipient that it hasn't been scanned for threats.
The following process adds a rule into Office 365 that will prepend a banner in the body of the email. This can be made to display whatever is required, but in this case we will display a warning.
Customer will need to have
- Microsoft 365
To follow the process you will need
- Admin login to Office 365
- Login to the customer Microsoft 365 tenancy with admin credentials
- Click to display all control panels
- Click into Exchange
- Click into Mail Flows, and then Rules
- Click to add a new rule.
- Call the rule a relevant name, we will call ours 'CFR Alert Banner'
- Click More options
- Click to apply this rule if
- the sender is located
- outside the organisation
- Add a condition
- Click to apply the rule if
A message header
Matches these text patterns
Click 'Enter text' and choose to specify the header name 'X-antispameurope-REASON'
Click 'Enter text patterns 'compliance-Rule-CLEAN-ID='
- In Do the following
Apply a disclaimer to the message
Prepend a disclaimer
Click Enter text
The text can be any plain text or HTML
A sample would be
'<p style="border:1px; border-style:solid; border-color: #FFCACA; background-color: #FFCACA; padding: 1em;"> <span style=font-size:12.0pt;color:black;><b>[Email has bypassed threat detection]</span></b> <span style=font-size:10.0pt;color:black> DO NOT CLICK links or attachments unless you recognize the sender and know the content is safe.</span></p>'
Ensure that the rule is enforced, and click Save.