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Overview
This KB article is to assist in making a mail rule that triggers on only external messages. It is not a complete process, just information on creating a single condition.
An external message is an e-mail that originates outside of Penn College.
Warning
- Email from some 3rd party PCT services may trigger this rule.
- It is highly recommended to use OWA to make all mail rules as it will only allow rules that are able to be processed server side, otherwise outlook may create client side rules which require Outlook to be running and will not work for mobile devices.
Description
To trigger a rule on external messages
Choose a Condition of Message header includes and enter the following header text
X-MS-Exchange-Organization-MessageDirectionality: Incoming
