transport rule to filter calendar items (Full Version)

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cammywebster -> transport rule to filter calendar items (6.Jan.2015 8:12:41 AM)

I've created a transport rule which blocks outbound emails from certain users to external domains with a few text/header exceptions for recipient domains.

Is it possible to further filter this rule to allow outbound calendar invitations and replies to be sent?

I've tried text/header options where "Content-Type" = "text/calendar" but this doesn't work. Also tried a filter for body content contains "Content-Type: text/calendar" but no joy. It looks as though 2013 allows easier filtering by MessageType = calendaring but can this be achieved in 2007?



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