Hey Danny,
looking at the knowledge I have on the system there is no way to disable tracking for specific users by certain security roles or similar configurations without them being able to enable it again.
Users are disabling/enabling mail tracking in their personal settings which are always accessible to them (gear symbol in the top right corner).
You can either enable or disable tracking for the whole organization with a few tricks/clicks.
On the other hand I've just thought of another "really dirty" solution to your problem but this is definitely not something I would recommend.
But what if...….
You could create a plug-in which triggers on "Record creation" of the E-Mail entity and checks whether the user is for example part of a specific team (e.g. a "Sales Team" which you created) or has a specific security role assigned and if the conditions meet, you can delete the E-Mail record.
That way any mail, that will be tracked into the system by users that have enabled their tracking but shall not do so, will be deleted in CRM.
But don't forget.... I wouldn't recommend that approach, just letting you know about the only solution to such a requirement I could think of.
