Hello everyone and thank you for taking the time to request this feature. As part of our investigation on adding this capability, we ask that you please help us gather additional information on how you use Pin. This helps us to prioritize and design the feature to be exactly what you need to get more done!
Please use the below link to access a short survey about Pin:Anonymous commented
Pin should just make that item (whether email or post) stick to the top of the folder it is placed in (whether Inbox or another one). It should be used to tag items that are of high importance to the topic of that folder and "time-insensitive" to make it easy to get to no matter when (and not subject to the normal date-focused view sorting).